De Morgan, Augustus, 1806-1871 |
A budget of paradoxes [Microform] / by Augustus De Morgan |
London : Longmans, Green, 1872. |
De Morgan, Sophia Elizabeth, 1809-1892 |
Memoir of Augustus De Morgan [Microform] / by his wife Sophia Elizabeth De Morgan; with selections from his letters. |
London : Longmans, Green, 1882. |