AYANABA, A. <br/><br/>
Biological Nitrogen fixation in farming Systems of the Tropics 

 - New York  John Wiley & Son  1977 
 - xi, 377p. 
<br/><br/><label>ISBN: </label>0-471-99499-5 
<br/><br/><label>Dewey Class. No.: </label>630.133