Methods for evaluating biological nitrogen fixation / 
edited by F. J. Bergersen. 
 - Chichester [Eng.] ;  New York :  J. Wiley,  c1980. 
 - x, 702 p. :  ill. 
<br/><br/> "A Wiley-Interscience publication." 
<br/><br/><label>LCCN: </label>55052032  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Nitrogen-fixing microorganisms<br/>Nitrogen--Fixation