Allan J A ed <br/><br/>
Sahara    ecologicaol change and early economic history 

 - London  School of Oriental and African Studies    1978 
 - xii,145p.  cm. 
<br/><br/> Includes bib 
<br/><br/><label>Standard No.: </label>89,631 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>GEOGRAPHY
<br/><br/><label>Dewey Class. No.: </label>U287.6.9R.dS, L8 (906)