Current developments in biological nitrogen fixation / 
edited by N. S. Subba Rao 
 - London :  Edward Arnold ,  1984 
 - xiv, 351 p. :  ill. ;  24 cm . 
<br/><br/>Includes references and index 
<br/><br/><label>ISBN: </label>0713128771 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Tropical crops<br/>Nitrogen--Fixation