Sahara and Sudan: vol. 1. Tripoli and Fezzan, Tibesti or Tu. / [print]
by Gustav Nachtigal ; translated from the original German with new introduction and notes by Allan G.B. Fisher and Humphrey J. Fisher.
- New York : Barnes and Noble ; Harper and Row Publishers, Incorporated, (c)1974.
- xx, 460 pages, illustrations, portraits, maps.
First published in German under the title Sahara und Sudan.