Stewart, W.D.P <br/><br/>
Nitrogen fixation by free-living micro-organisms 

 - Cambridge  Cambridge U.P.  1975 
 - 471 p. 
 - International biological programme .
<br/><br/><label>ISBN: </label>0521207088 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plants
<br/><br/><label>Dewey Class. No.: </label>581.13  / NIT