Nitrogen fixation by free-living micro-organisms / 
edited by W. D. P. Stewart. 
 - Cambridge, Eng. ;  New York :  Cambridge University Press,  1975,2011 
 - xxi, 471 p. :  ill. ;  24 cm. 
<br/><br/> "Papers presented at an IBP synthesis meeting on nitrogen fixation held in Edinburgh in September 1973, together with contributions submitted by other[s]."  Includes bibliographies and index. 
<br/><br/><label>ISBN: </label>9780521279321 0521207088 9780521207089 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Nitrogen--Fixation--Congresses.<br/>Nitrogen-fixing microorganisms--Congresses.
<br/><br/><label>Dewey Class. No.: </label>589.704133  / NIT 2011