Proceedings of the nitrogen fixation and soil fertility  (Book) 

 - Sri Lanka  University of Peradeniya  1989 
 - 120 p.  24 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Nitrogen--Fixation--Congresses Soil fertility--Congresses
<br/><br/><label>Universal Decimal Class. No.: </label>631.461.5:631.452 PRO  / 4339