Workshop on Nitrogen Fixation and Soil Fertility(2nd: 1989: Sri Lanka)   <br/><br/>
Proceedings of the second workshop on nitrogen fixation and soil fertility  (Book) 

 - Peradeniya  University of Peradeniya  1989 
 - 127 p.  24 cm. 
<br/><br/><label>Universal Decimal Class. No.: </label>631.431.48 WOR  / 7238