Desertification    Its causes and consequences. 

 - New  York Pergamon Press U S A    1977 
 - "v,448p. Bib p. 446-48"  cm. 
<br/><br/><label>Standard No.: </label>125997 
<br/><br/><label>Source: </label> Reference Collections 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Hydrology
<br/><br/><label>Dewey Class. No.: </label>"U241p1,N77, L7/UN"