KUMARASINGHE, K. S. <br/><br/>
Isotopic Studies of Azolla and Nitrogen Fertilization of Rice 

 - London.  Kluwer Academic Publishers,  1993 
 - xi, 145p. 
<br/><br/><label>ISBN: </label>0-7923-2274-6 
<br/><br/><label>Dewey Class. No.: </label>633.188947