Nitrogen fixation / 
Edited by W. J. Broughton. 
 - London :  Clarendon Press,  c 1981. 
 - Vols. :  ill. ;  24 cm. 
<br/><br/> Includes index. 
<br/><br/>V. 1- Ecology ; 
<br/><br/>341  341 
<br/><br/><label>ISBN: </label>0-19-854540-1 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Nitrogen -- Fixation.
<br/><br/><label>Dewey Class. No.: </label>574.5 / B797n