Kumada, Kyoichi,  1921- <br/><br/>
Chemistry of soil organic matter / 
Kyoichi Kumada 
 - Tokyo :  Japan Scientific Societies Press,  1987 
 - 241 p. :  ill. ;  24 cm. 
 - Developments in soil science  v. 17 .
<br/><br/><label>ISBN: </label>0444989366 
<br/><br/><label>LCCN: </label>87-027531 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Humus<br/>Humic acid