proceedings of the Fourth International Conference of the African Association for Biological Nitrogen Fixation (AABNF), held at the International Institute of Tropical Agriculture (IITA), Ibadan, Nigeria, 24-28 September 1990 African Association for Biological Nitrogen Fixation Conference (4th : 1990 : International Institute of Tropical Agriculture) creator Mulongoy, K. Gueye, Mamadou 1950- Spencer, Dunstan S. C. text Chichester, West Sussex, U.K New York J. Wiley c1992 monographic xiv, 488 p. : ill. ; 26 cm. edited by K. Mulongoy, M. Gueye, and D.S.C. Spencer. Includes bibliographical references. w------ f------ Nitrogen in agriculture Tropics Congresses Agriculture (General) Nitrogen in agriculture Africa Congresses Nitrogen Fixation Congresses Nitrogen-fixing plants Tropics Congresses Nitrogen-fixing plants Africa Congresses Cropping systems Tropics Congresses Cropping systems Africa Congresses Sustainable agriculture Tropics Congresses Sustainable agriculture Africa Congresses S587.5.N5 A36 1990 631.8/47/0966 0471935603 92243318 http://www.loc.gov/catdir/description/wiley036/92243318.html http://www.loc.gov/catdir/toc/onix07/92243318.html http://www.loc.gov/catdir/description/wiley036/92243318.html http://www.loc.gov/catdir/toc/onix07/92243318.html UOEL 000 20150318094538.0 628651