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	1.	Biological nitrogen fixation for sustainable agriculture : extended versions of papers presented in the symposium, Role of Biological Nitrogen Fixation in Sustainable Agriculture, at the 13th Congress of Soil Science, Kyoto, Japan, 1990 / edited by J.K. Ladha, T. George, and B.B. Bohlool. by Ladha, J. K. (Jagdish Kumar), 1952- George, T. (Thomas), 1958- Bohlool, Behzad Ben International Congress of Soil Science (13th : 1990 : Kyoto, Japan) Series: Developments in plant and soil sciences ; v. 49 Publication details: Dordrecht ; Boston : Kluwer Academic Publishers, International Rice Research Institute, 1992 Availability: Not available: Main: Withdrawn (1). Add to cart (remove)
	2.	Biological nitrogen fixation and sustainability of tropical agriculture : 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 / edited by K. Mulongoy, M. Gueye, and D.S.C. Spencer. by African Association for Biological Nitrogen Fixation. Conference (4th : 1990 : International Institute of Tropical Agriculture) Mulongoy, K Gueye, M Spencer, D. S. C Publication details: Chichester, West Sussex, U.K. ; New York : J. Wiley, c1992 Availability: Not available: Main: Withdrawn (1). Add to cart (remove)

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