Tropical grazing land ecosystems  : a state of knowledge report 
Unesco  
 - Paris:  Uesco,  1979. 
 - 655p 
<br/><br/><br/>eng 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Land use<br/>national resources 
<br/><br/><label>Dewey Class. No.: </label>333.74  / UNT