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  1. 1
    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 /

    Biological nitrogen fixation and sustainability of tropical agriculture : proceedings of the Fourth International Conference of the African Association for Biological Nitrogen Fixa...

    יצא לאור 1992
    ספר

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  2. 2
    Management of biological nitrogen fixation for the development of more productive and sustainable agricultural systems : extended versions of papers presented at the Symposium on Biological Nitrogen Fixation for Sustainable Agriculture at the 15th Congress of Soil Science, Acapulco, Mexico, 1994 /

    Management of biological nitrogen fixation for the development of more productive and sustainable agricultural systems : extended versions of papers presented at the Symposium on B...

    יצא לאור 1995
    Conference Proceeding ספר

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