Methods of study in soil ecology; proceedings of the Paris symposium ... 

 - Paris :  UNESCO,  1970 
 - 303 p.  : ilus. 
 - Ecology and conservation  ; 2 .
 - Ecology and conservation  ; 2 .
<br/><br/><label>LCCN: </label>45899 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Suelos--Ecología.
<br/><br/><label>Dewey Class. No.: </label>631.46  / U54