Soil Biology  : Reviews of Research 

 - UNESCO (United Nations Educational, Scientific and Cultural Organization)  Belgium  1969 
 - 240p.  fig., ill. 
 - Volume   IX (9) .
<br/><br/><label>Nat. Bib. No.: </label>3475 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agriculture
<br/><br/><label>Universal Decimal Class. No.: </label>631.46  / SOI