Case study on desertification the eghazer and azawak region niger 

 - Nairobi  United Nations Publication          1977 
 - V;93p  cm. 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>V1N45,93(V214).N77p, L7/UN