Mohr, Paul. (1998). Africa Beckoning: Explorers of Eastern Africa, its rift valleys and geology, in the 19th and early 20th centuries: Two essays and bibliographies. Galway:

Mohr, Paul. (1998). Africa Beckoning: Explorers of Eastern Africa, its rift valleys and geology, in the 19^th and early 20^th centuries: Two essays and bibliographies. Galway: Milbrook Nova Press. 1^st edition. 192pp. Paperback. Part one – Ethiopia – Eritrea – Somalia. Part two  - East African Rifts, Volcanoes and Bones. In as new condition.