Kumada, Kyoichi  1921-, <br/><br/>
Chemistry of soil organic matter / 
Kyoichi kumada 
 - Xi, 241 páginas 
 - Development in soil science ;  17 .
<br/><br/><label>ISBN: </label>4762205346  (japon) 0-444-98936-6  (elsevier) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Humus<br/>Ácido húmico
<br/><br/><label>LC Class. No.: </label>S592.8  / K85