Non symbictic nitrogen fination and organic matter in the tropics :  12 th international congress of soil science held on New Delhi, India February 8 -16, 1982 / 
International congress of soil science 
 - New Delhi :  International Congress of Soil Science,  1982- 
 - v. ;  23 cm. 
 - Managing resourcs to meet the challenges to mankind .
<br/><br/> Library has vol. 1, 2 and 3 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Soils--Composition<br/>Soil Chemistry
<br/><br/><label>Dewey Class. No.: </label>631.41