Mohr, Paul Anthony. <br/><br/>
Africa Beckoning  explorers of eastern Africa, its rift valleys and geology, in the 19th and early 20th centuries. Two essays and bibliographies. 

 - 192 p.  ill. 
<br/><br/> Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0954317734