Thomas, Gerald W. <br/><br/>
The Sahelian/Sudanian zones of Africa profile pof a fragile environment 

 - New Mexico:  New Mexico State University,  1981 
 - 99p.:  28cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Arid regions<br/>Agriculture<br/>Environment<br/>Desertification<br/>Environmental aspects
<br/><br/><label>LC Class. No.: </label>ERB PAM S616.A448T46