Nutman, P.S <br/><br/>
Symbiotic Nitrogen fixation in plants 

 - London   Cambridge university  1976 
 - 584p. 
<br/><br/><label>ISBN: </label>0521206456 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Nitrogen Fixation
<br/><br/><label>Dewey Class. No.: </label>572.5452 NUT