Guidelines for the control of soil degradation. 

 - Rome :  United Nations Environment Programme,  1983. 
 - v, 38 p. : ill. 
<br/><br/> "M-57"--T.p. verso. 
<br/><br/><label>ISBN: </label>9251014043 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Soil conservation.<br/>Soil degradation.