Walker B H Ed. <br/><br/>
Management of semi arid ecosystems 

 - Amsterdam  Elsevier            1979 
 - x,398p. Bib chapterwise  cm. 
 - Developments in agricultural and managedforest ecology.7 .
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geography-Modern
<br/><br/><label>Dewey Class. No.: </label>U:(G:5).1911.N7, L9