Soil organic matter 
edited by M. Schnitzer and S. U. Khan 
 - Amsterdam  Elsevier Scientific  1978 
 - xiii, 319 p.  ill  25 cm. 
 - Developments in soil science  8 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Humus
<br/><br/><label>Dewey Class. No.: </label>631.4  / 17