| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| The Opening of the Nile Basin: Writings by members of the Catholic Mission to Central Africa on the geography and ethnography of the Sudan, 1842-1881 | 978-O-O6-496933-8 (O-O6-496933-9) | 1975 |
E.T. · Elias T. · H. E. · H.T. · HILL E · R. E. · R. Elias · R. H. · R. Hill · R. T. · Richard E. · Richard Elias · Richard H. · Richard Hill · Richard T.