| "For the love of God" | Cassells, D. B. | Article in Journal | | 1988 |
| "Grandpa, tell me 'bout the good old days" | Cassells, Brian | Article in Journal | | 2004 |
| "The Inst" at 150: A sequicentenary review | Cassells, Joe | Article in Journal | | 2010 |
| 'Completing the Union' : critical ennui, the politics of narrative, and the reformation of Irish cultural identity | Miers, Mitzi | Article in Book | Cass | 1996 |
| 'I like it - I just don't know what to do with it': the student-successor in Irish family farming | Cassidy, Anne | Article in Journal | | 2017 |
| 'My dear men' : the Monica Roberts collection from the First World War | Kelly, Bernard | Article in Book | Dublin City Council | 2018 |
| 'The Yellow Cross' | Cunningham, T. P. | Article in Journal | | 1986 |
| 100 Years of Fairview's Edge Hardware: 1917-2017 | Moore, Cormac | Article in Book | Dublin City Council | 2018 |
| 1916, the Easter Rising | Coogan, Tim Pat | Monograph or Collective Volume | Cassell | 2001 |
| A bumpy ride : Dublin railway workers and the 1908 old age pension | Muldowney, Mary | Article in Book | Dublin City Council | 2018 |
| A hotel/boat for the Montiaghs? | Cassells, Brian | Article in Journal | | 2007 |
| A path directed : life and times of Belfast city missionary and First World War veteran, James Cassidy (1892-1970) | Cassidy, Dennis | Monograph or Collective Volume | Ollav Healer Publications | 1993 |
| A short history of the Air Corps | Cassidy, M. | Article in Journal | | 1980 |
| Additional sidelights on Belfast history. Foreword by Sir Lynden Livingston Macassey | Millin, S. S. (Samuel Shannon) | Monograph or Collective Volume | Baird | 1938 |
| After Slavery : Forced Drafts of Irish and Chinese Labor in the American Civil War, or the Search for Liquid Labor | Nelson, Scott Reynolds | Article in Book | | 2007 |
| An Irish grave on Monte Cassino : Father Benjamin Joseph Braughall, pilgrim priest of Kildare (1776-1847) | Concannon, Helena | Article in Journal | | 1947 |
| An open door : a history of the society of St Vincent de Paul, Galway, 1849-1999 | | Monograph or Collective Volume | Vincent de Paul Society | 1999 |
| Archbishop William Hayden (1868-1936) | Cassin, Maeve | Article in Journal | | 1994 |
| Arklow man's voyage of discovery | Cassell, Margo | Article in Journal | | 2010 |
| Armagh Public Library | Cassidy, Herbert | Article in Journal | | 1993 |
| Athenry under siege | Casserley, Jim | Article in Journal | | 1998 |
| Awkward Prods : biographical studies of Progressive Protestants and political allegiance in Northern Ireland | Greer, JamesWalker, Graham | Article in Journal | | 2018 |
| Bataille de Baziege de 1219: donnees nouvelles sur le cadre de la bataille | Aries, Lucien | Article in Book | | 2017 |
| Blarney Castle Gardens, Co. Cork... the history of the gardens at one of Ireland's most popular tourist destinations | Cassells, Judy | Article in Journal | | 2012 |
| Brian Friel : translations, interpretations, interpolations | Fusco, Cassandra | Article in Book | | 1996 |
| Burial practices | Cassidy, LaraGormley, SarahMcSparron, CormacMurphy, Eileen | Article in Book | | 2022 |
| Buses, trains and Gaelic games : a history of C.I.E. G.A.A. clubs | Cassidy, John | Monograph or Collective Volume | Original Writing | 2009 |
| By rail to the golf : NIR and the 2012 Irish open at Portrush | Cassells, J A | Article in Journal | | 2013 |
| Cad a dhéanfas sgríobhnóir idir an dá linn?’: Blianta luatha an Ghúim agus tionchar éiginnteacht na rialacha maidir le foilsiú sa chló Gaelach agus sa chló Rómhánach orthu | Cassin, Teresa | Article in Journal | | 2020 |
| Carrickfergus and the revolution in castle design c.1200 | Tietszch-Tyler, Daniel | Article in Book | | 2017 |
| Cassell's battlefields of Britain and Ireland | Brooks, Richard, 1949- | Monograph or Collective Volume | Weidenfeld and Nicolson | 2005 |
| Cassian, Contemplation, and Medieval Irish Hagiography | Follett, Westley | Article in Book | | 2006 |
| Catholic clergy of Tullaherin parish | Cassin, Mary | Article in Journal | | 1987 |
| Ceapadh chéad Choimisiún Béaloideasa Éireann, 1934-1935 | Briody, Micheál | Article in Journal | | 2010 |
| Church and state in contemporary Europe : the chimera of neutrality | | Monograph or Collective Volume | Cass | 2003 |
| Church chapel and meeting house - religious diversity in Cootehill in the eighteenth century | Cassidy, Patrick | Article in Journal | | 2000 |
| Contemporary personalities | Smith, Frederick Edwin, 1st earl of Birkenhead, 1872-1930 | Monograph or Collective Volume | Cassell | 1924 |
| Continental stuccowork and English rococo carving at Russborough | McDonnell, Joseph | Article in Journal | | 2011 |
| Countess Markievicz, 1868-1927 | Walsh, Edward S. | Monograph or Collective Volume | Lisadell Press | 2007 |
| County Carlow's railway past | McAssey, AlanRedmond, EamonnRogers, Ger | Article in Journal | | 2018 |
| Dark days on the Lough | Cassells, Brian | Article in Journal | | 2008 |
| Digging at Dunbell Big | Cassidy, B. | Article in Journal | | 1991 |
| Do sheans: Children's Agency in Integrating. Scottish Gaelic and Irish into 'Happy Families' | Smith-Christmas, Cassie, | Article in Book | | 2022 |
| Donegal needs War Museum | McGarrigle, Joe | Article in Journal | | 1981 |
| Eileen Murray [1885-1962] | Cassidy, Breege | Article in Journal | | 2008 |
| Evacuees in school | Cassells, Brian | Article in Journal | | 2008 |
| Exhibiting Éire: Representations of Women in the Easter Rising Centenary Commemorations | Casserly, Maeve | Article in Book | | 2021 |
| Exploiting democracy : the IRA's tactical cease-fire | Stevenson, Jonathan | Article in Book | | 2003 |
| Farm, place and identity construction among Irish farm youth who migrate | Cassidy, AnneMcGrath, Brian | Article in Journal | | 2015 |
| Feartlaoithe (Elegies) Dean Herbert Cassidy (1935-2013) | Batchelor, John | Article in Journal | | 2013 |
| Fifty years of Parliament | Asquith, H. H. (Herbert Henry), 1852-1928. | Monograph or Collective Volume | Cassell | 1926 |
| Finglas through the ages | Brown, MichaelCassidy, MaureenLarkin, DaraMcLoughlin, Majella | Monograph or Collective Volume | Finglas Environmental Heritage Project | 1991 |
| Forty shades of steam : the story of the Railway Preservation Society of Ireland | Cassells, JoeFriel, Charles, P. | Monograph or Collective Volume | Colourpoint Books | 2004 |
| Fregit bellum ante Cassibellaunum | Löfstedt, Bengt | Article in Journal | | 1981 |
| Friar Thomas Francis Cassidy and his large collection of books | Fennessy, Ignatius, OFM | Article in Journal | | 2009 |
| Friar Thomas Francis Cassidy and his large collection of books | Fennessy, Ignatius, OFM | Article in Journal | | 2009 |
| From Carcassonne to Carickfergus : the legacy of de Lacy's crusade experience in Britain and Ireland | Duffy, Paul | Article in Book | | 2017 |
| From Carrickfergus to Carcassonne: Hugh de Lacy and the Albigensian Crusade | Brown, Daniel J. F.Duffy, Paul | Article in Book | | 2017 |
| From Carrickfergus to Carcassonne: the epic deeds of Hugh de Lacy during the Albigensian crusade | | Monograph or Collective Volume | Brepols | 2017 |
| Further evidence for the influence of the Hibernensis in southern Italy : an early eleventh-century canonistic florilegium at Montecassino | Reynolds, Roger E. | Article in Journal | | 2005 |
| Gallipoli and Ireland | Jeffery, Keith | Article in Book | | 2004 |
| Galway | Casserly, James | Article in Journal | | 1999 |
| Gender, Hybridity, and Violence on the Frontiers of Late-Medieval and Early-Modern Ireland | Hall, DianneMalcolm, Elizabeth | Article in Book | | 2008 |
| Haidee's diary. A glimpse at daily life in the Big House 1889 as seen through the eyes of Haidee Dopping-Heppenstal, Derrycassan | MacNerney, James P. | Article in Journal | | 2006 |
| Here and there in St. Canice's parish | Cassin, M. | Article in Journal | | 1958 |
| History of Ireland | Casserly, D. | Monograph or Collective Volume | Talbot Press | 1943 |
| History on your doorstep : six stories of Dublin history | NA | Monograph or Collective Volume | Dublin City Council | 2018 |
| History on your doorstep volume 2 : six more stories of Dublin history | NA | Monograph or Collective Volume | Dublin City Council | 2019 |
| Housing in troubled times: Spitalfields, St. James's Walk, McCaffrey's and Fairbrother's Fields housing | Scuffil, Catherine | Article in Book | Dublin City Council | 2019 |
| I never had a proper job: a life in the theatre | Cassin, Barry | Monograph or Collective Volume | Liberties Press | 2012 |
| Idé-eolaíochtaí teanga i gcaidreamh teaghlaigh in Albain | Smith-Christmas, Cassie | Article in Book | | 2018 |
| Identifying Hugh II de Lacy's contribution to Dundrum castle (Co. Down) | MacDonald, Philip | Article in Book | | 2017 |
| Imaginary Cassandra? Conor Cruise O'Brien as public intellectual in Ireland | Garvin, Tom | Article in Journal | | 2007 |
| Ireland and Britain's second application to join the EEC | Toomey, Jane | Article in Book | | 2003 |
| Ireland and international peacekeeping operations, 1960-2000 : a study of Irish motivation | Ishizuka, K. | Monograph or Collective Volume | Cass | 2004 |
| Ireland in Britain and the British seas | Sloan, Geoffrey R. | Article in Book | | 2005 |
| Ireland in spy fiction | Jeffery, KeithO'Halpin, Eunan | Article in Journal | | 1991 |
| Ireland, 1854-1939 | O'Halpin, Eunan | Article in Book | | 1987 |
| Irish bookbindings, 1600-1800 | Craig, Maurice James | Monograph or Collective Volume | Cassell | 1954 |
| Irish casualties at Cassano | Jennings, Brendan | Article in Journal | | 1945 |
| Irish coinage and Italian merchants in the reign of Edward I | Cassidy, Richard | Article in Journal | | 2023 |
| Irish drinking worlds : a socio-cultural reinterpretation of ambivalence | Cassidy, Tanya | Article in Journal | | 1996 |
| Irish English and Irish studies : exploring language use and identity through fictional constructions of laddism | Amador-Moreno, Carolina P.Barron, AnneTully, Cassandra S. | Article in Journal | | 2023 |
| Irish Georgian silver | Bennett, Douglas | Monograph or Collective Volume | Cassell | 1972 |
| Irish railways in the heyday of steam | Casserley, Henry Cyril | Monograph or Collective Volume | Bradford Barton | 1979 |
| It said in the papers - 1904 | Cassin, Mary | Article in Journal | | 2002 |
| John Cassian and the development of early Irish Christianity : a study of the state of the literature | Crites, G. J. | Article in Journal | | 2002 |
| John Cassidy, Manchester sculptor and his patrons : their contribution to Manchester life and landscape | Hulme, Charles | Article in Journal | | 2012 |
| Lambeg churchyard, Lisburn, Co. Antrim. Inscriptions on old tombstones (1627-1837) and on those of special interest up to the present day, with notes | Cassidy, William | Monograph or Collective Volume | [Lambeg Parish Church] | 1937 |
| Lessons in medical politics : Thomas Wakley and the Irish medical charities, 1827-1839 | Cassell, R. D. | Article in Journal | | 1990 |
| Life and times of 'Kate the Navvy' | Matthews, Brendan | Article in Journal | | 2014 |
| Literature and locality : the literary topography of Britain and Ireland | Freeman, John | Monograph or Collective Volume | Cassell | 1963 |
| Living standards | Cassells, Peter | Article in Book | | 1986 |
| Local revolution: Dublin Corporation and the War of Independence, 1919 to 1921 | Kelly, Bernard | Article in Book | Dublin City Council | 2019 |
| Loughrea social and literary club, 1892-1895 | Cassidy, Christina | Article in Book | | 2003 |
| Making Twescard : the de Lacy/O'Neill campaign in northern Ulster, 1223-24 | McIlreavy, David | Article in Book | | 2017 |
| Matt Talbot and the saints | Cassidy, James F. (James Francis), b. 1890 | Article in Journal | | 1945 |
| Maud Gonne | Levenson, Samuel | Monograph or Collective Volume | Cassell | 1977 |
| May, Lou & Cass : Jane Austen's nieces in Ireland | Hillen, Sophia | Monograph or Collective Volume | Blackstaff Press | 2011 |
| Medical Charities, Medical Politics : The Irish Dispensary System and the Poor Law, 1836-1872 | Cassell, Ronald Drake | Monograph or Collective Volume | Boydell & Brewer | 1997 |
| Medical charities, medical politics : the Irish dispensary system and the poor law, 1836-1872 | Cassell, Ronald Drake | Monograph or Collective Volume | Boydell | 1997 |
| Military leadership in the British civil wars, 1642-1651 : "the genius of this age" | Carpenter, Stanley D. M. | Monograph or Collective Volume | Cass | 2005 |
| Modern music in Ireland | Cass, Brian | Article in Book | | 2011 |
| New light on Hugh Montgomerie, Richard Castle and No. 85 St Stephen's Green | Calderón, Loreto,Dechant, Konrad, | Article in Book | | 2010 |
| Newman House. History and Associations | Igoe, Vivien | Article in Journal | | 2022 |
| News from the canal bank | Cassells, Brian | Article in Journal | | 2015 |
| Noel Cassidy [d. October 1995] | Walton, Julian | Article in Journal | | 1996 |
| Non-conformist religious denominations in County Cavan in the seventeenth and eighteenth centuries | Cassidy, Patrick | Article in Book | | 2014 |
| Notes on the O'Cassidy scribes | Ó Tuathail, Éamonn | Article in Journal | | 1940 |
| Obituaries. Desmond Cassidy (1933-2023) | Woggon, Helga | Article in Journal | | 2023 |
| Obituaries. Pat Cassidy | Anonymous | Article in Journal | | 2017 |
| Obligationes pro annatis diocesis Cassellensis, [1433-1534] | | Article in Journal | | 1966 |
| Outline of Irish railway history | Casserley, H. C. | Monograph or Collective Volume | David & Charles | 1974 |
| Outline of Irish railway history | Casserly, H. C. | Monograph or Collective Volume | David & Charles | 1974 |
| Patrick Sarsfield Cassidy (1882-1903): From Dunkineely to New York | Meehan, Helen | Article in Journal | | 2020 |
| Paul Mellon's legacy : a passion for British art : masterpieces from the Yale Center for British Art | | Monograph or Collective Volume | Yale University Press | 2007 |
| Peel and the conservative party : a study in party politics, 1832-1841 | Clark, George | Monograph or Collective Volume | Cass | 1964 |
| Political parties and terrorist groups | | Monograph or Collective Volume | Cass | 1992 |
| Prelude to the Easter Rising : Sir Roger Casement in imperial Germany | Doerries, Reinhard R. | Monograph or Collective Volume | Cass | 2000 |
| Presbyterianism in Lurgan 1684-1984 | Cassells, D. B. | Article in Journal | | 1983 |
| Private Con Duggan | Boner, Seán | Article in Journal | | 2016 |
| Public history, invisibility, and women in the Republic of Ireland | Casserly, MaeveO'Neill, Ciaran | Article in Journal | | 2017 |
| Roscommon town G.A.A. : a history 1889-1983 | Cassidy, Michael | Monograph or Collective Volume | Roscommon Gaels | 1984 |
| Saturday, 16 July 1966 | Cassells, Joe | Article in Journal | | 2015 |
| Séamus Ennis: An fear ceoil | Curry, James | Article in Book | Dublin City Council | 2019 |
| Some noted priests of yesterday | Cassidy, James F. (James Francis), b. 1890 | Monograph or Collective Volume | Talbot Press | 1940 |
| St John's Cathedral, Sligo | Doyle, Bernie | Article in Journal | | 2018 |
| St. Ultan’s: a ground-breaking institution for the health and well-being of women, children and doctors alike | Casserly, Maeve | Article in Book | Dublin City Council | 2019 |
| Strategies of Comital and Crusader Lordship under Hugh II de Lacy | Brown, Daniel J. F. | Article in Book | | 2017 |
| Studies in the illustration of the Psalter | | Monograph or Collective Volume | Shaun Tyas | 2000 |
| Suffragette's city : a walking tour of the suffrage movement in Dublin City | Casserly, Maeve | Article in Book | Dublin City Council | 2018 |
| Swift's sermons, 'public conscience,' and the privatization of religion | Lund, Roger D. | Article in Book | | 1996 |
| Tenements, suburbia and the remarkable architect Herbert Simms | Fallon, Donal | Article in Book | Dublin City Council | 2018 |
| The arms of St George's church, Belfast | Cassidy, William | Article in Journal | | 1947 |
| The ballot bomb : terrorism and the electoral process in Northern Ireland | Guelke, AdrianSmyth, Jim | Article in Book | | 1992 |
| The Battle of the Big Cross | | Monograph or Collective Volume | Clonakilty District 1798 Bi-Centenary Commemoration Committee | 1998 |
| The big house in Ireland | Pakenham, Valerie | Monograph or Collective Volume | Cassell | 2000 |
| The Book of Kells and the Corbie Psalter (with a note on Harley 2788) | Meehan, Bernard | Article in Book | | 2000 |
| The British state and Northern Ireland : can the national question be reformed? | Girvin, Brian | Article in Book | | 2000 |
| The Cathar heresy and Anglo-Norman Ireland | Duffy, PaulO'Keeffe, TadhgPicard, Jean-Michel | Article in Book | | 2017 |
| The chapel of the ford, Belfast | Cassidy, WilliamLawlor, H. C. (Henry Cairnes), 1870-1943 | Article in Journal | | 1945 |
| The Chateau Narbonnais of Toulouse during the siege of 1218 | Catalo, Jean | Article in Book | | 2017 |
| The Clunes from the Dalcassians to modern times | Clune, Conor F. | Monograph or Collective Volume | Quinville Press | 1992 |
| The Cootes of Cootehill | Cassidy, Patrick | Article in Journal | | 2001 |
| The criminalization of "free" labour : master and servant in comparative perspective | Craven, PaulHay, Douglas | Article in Journal | | 1995 |
| The Crown, Empire loyalism and the assimilation of non-British white subjects in the British world : an argument against "ethnic determinism" | Lowry, Donal | Article in Journal | | 2003 |
| The Dalcassians | Ryan, John | Article in Journal | | 1943 |
| The district of Loughrea, Vol. 1 : history 1791-1918 | | Monograph or Collective Volume | Loughrea History Project | 2003 |
| The district of Loughrea, Vol. 2 : folklore 1860-1960 | | Monograph or Collective Volume | Loughrea History Project | 2003 |
| The effects of the Spanish Civil War on Ireland | Armstrong, Ken | Article in Journal | | 2006 |
| The Gallipoli and Salonika diaries of Lieutenant Louis Cassidy, R.A.M.C. (1877-1928) | Sweetman, Roger | Article in Journal | | 2017 |
| The Great Dublin Strike : A carnival of Reaction | Cassels, Peter | Article in Book | | 2008 |
| The Great Famine in Stranorlar, County Donegal | Cassidy, Cróna | Monograph or Collective Volume | Chris Lawlor | 2012 |
| The great Father Tom Burke | Cassidy, James F. (James Francis), b. 1890 | Monograph or Collective Volume | Gill | 1947 |
| The harp and the shield of David : Ireland, Zionism and the State of Israel | Eliash, Shulamit | Monograph or Collective Volume | Routledge | 2007 |
| The Home Rule Bill | Anonymous | Monograph or Collective Volume | Cassell | 1912 |
| The illusion of state neutrality in a secularising Ireland | Kissane, Bill | Article in Book | | 2003 |
| The importance of being Irish | Bestic, Alan | Monograph or Collective Volume | Cassell | 1969 |
| The IRA and armed struggle | Alonso, Rogelio | Monograph or Collective Volume | Routledge | 2007 |
| The IRA, 1968-2000 : analysis of a secret army | Bell, J. Bowyer | Monograph or Collective Volume | Cass | 2000 |
| The Irish patrons of Rosalba Cassiera (1675-1757) | Drumm, Sarah Rhiannon | Article in Journal | | 2003 |
| The Irish soldier in the Boer War | Jeffery, Keith | Article in Book | | 2000 |
| The life and times of Captain M.S. Cassan | Cassan-Reese, KenCassan-Reese, Patricia | Article in Book | | 2000 |
| The markets and fairs of Cootehill, county Cavan | Cassidy, Patrick | Article in Book | | 2001 |
| The medieval archaeology of Carrickfergus town (Co. Antrim): a brief survey | Ó Baoill, Ruairí | Article in Book | | 2017 |
| The meeting houses of Cavan - non-comformist religious denominations in Cavan town from the seventeenth to the nineteenth centuries | Cassidy, Patrick | Article in Book | | 2012 |
| The Moravian church in county Cavan 1751-1924 | Cassidy, Patrick | Article in Journal | | 2003 |
| The old Mon : the story of the Patrician Brothers School, Lombard Street, Galway | Casserly, James | Monograph or Collective Volume | [s.n.] | 1997 |
| The origin and growth of the Presbyterian Church in county Cavan | Cassidy, Patrick | Article in Journal | | 2012 |
| The Peace Egg Book : An Anglo-Irish chapbook connection discovered | Cass, EddiePreston, Michael J.Smith, Paul | Article in Journal | | 2003 |
| The Printing History of The Peace Egg Chapbooks | Cass, Eddie | Article in Book | | 2008 |
| The Quakers of Cootehill | Cassidy, Patrick | Article in Journal | | 2002 |
| The Quakers of County Cavan 1655-1900 | Cassidy, Patrick | Article in Journal | | 2010 |
| The R H Tucker and its unfortunate Irish visit | McMahon, Enda | Article in Journal | | 2017 |
| The return of a poet | Cassidy, Luke | Article in Journal | | 1996 |
| The scalpel and the ledger : finance, medicine and the making of a professional life in Ireland, India and Britain, 1888-1921 | Fitzpatrick, Kieran ; Cassidy, Daniel | Article in Journal | | 2024 |
| The strange death of Dominion status | McIntyre, W. David (William David), 1932- | Article in Journal | | 1999 |
| The Ulster canal | Cassells, Brian | Article in Journal | | 2002 |
| Together again | O'Boyle, Donal K. | Article in Journal | | 1981 |
| Transcriptions on headstones in Carrowhill graveyard | Cassidy, J. V.Gallagher, Bryan | Article in Journal | | 1983 |
| Transmission and circulation of French texts in medieval Ireland: the other Simon de Montfort | Picard, Jean-Michel | Article in Book | | 2017 |
| Tribute to Eric McElroy, 1933-2004 | Cassells, Brian | Article in Journal | | 2004 |
| Tribute to the late Tommy Cassidy | Kelly, Seán T. | Article in Journal | | 2017 |
| Trim before 1224 : new thoughts on the caput of de Lacy lordship in Ireland | O'Keeffe, Tadhg | Article in Book | | 2017 |
| Tullaherin land purchase dispute, 1916-20 | Cassin, Mary | Article in Journal | | 2003 |
| United Irishmen in democratic America | Cassirer, Reinhard | Article in Journal | | 1938 |
| Unravelling a Coleraine family mystery. The story of James and Katharine McFaull | Cunningham, Jennifer | Article in Journal | | 2011 |
| Veterinary inspection at Waterford port, 1876-1900 | Cassidy, M. | Article in Journal | | 1980 |
| Virginia : a portrait celebrating 400 years, 1612-2012 | | Monograph or Collective Volume | Virginia 400 Committee | 2012 |
| Whisht... Irish Traveller Folktales and Songs. The Cassidys 1967 | MacWeeney, Alen | Monograph or Collective Volume | Pavee Point | 2004 |
| William Spence, Victorian engineer : right man, right place, right time | Scuffil, Catherine | Article in Book | Dublin City Council | 2018 |
| Woolworth's | Cassoni, Mary | Article in Journal | | 2018 |
| “Our dead shall not have died in vain”: The War Poetry of Harry Midgley | Phillips, Terry | Article in Book | | 2015 |