Biological nitrogen fixation in farming systems of the Tropics / 
edited by A. Ayanaba and P. J. Dart. 
 - New York :  Wiley,  c1977. 
 - xi, 377 p. :  ill. ;  24 cm. 
<br/><br/> "Based on papers presented at a symposium held at the International Institute of Tropical Agriculture, Ibadan, Nigeria, in October 1975."  "A Wiley-Interscience publication." 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0471994995 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Nitrogen--Fixation--Congresses.<br/>Agriculture--Tropics--Congresses.<br/>Cropping systems--Tropics--Congresses.
<br/><br/><label>Dewey Class. No.: </label>631.84