| Agriculture and other natural resources | O'Connor, Robert | Article in Book | | 1986 |
| Estimates of gross and net output and income arising in agriculture in all Ireland and in the Free State area in selected years between 1900/01 and 1926-27 | Henry, E. W.O'Connor, Robert | Article in Journal | | 1996 |
| Estimates of gross and net output and income arising in agriculture in all Ireland and in the Free State area in selected years between 1908 and 1926/27 | Henry, E. W.O'Connor, Robert | Monograph or Collective Volume | Economic and Social Research Institute | 1995 |
| Estimates of gross and net output and income arising in agriculture in all Ireland and the Free State area in selected years between 1900/01 and 1926/27 | Henry, E. W.O'Connor, Robert | Monograph or Collective Volume | Economic and Social Research Institute | 1996 |