Stewart, D.p <br/><br/>
Nitrogen fixation by Free living Micro Organisms 

 - Cambridge  Cambridge university  1975 
 - 471p. 
<br/><br/><label>ISBN: </label>0521207088 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Nitrogen - fixation<br/>nitrogen- fixing Micro-organisms
<br/><br/><label>Dewey Class. No.: </label>572.54529 STE