Giller,Ken E, & wilson,kate j. (1991). Nitrogen fixation in tropical croping systems. CAB international.
Chicago Edition CitationGiller,Ken E, and wilson,kate j. Nitrogen Fixation in Tropical Croping Systems. United Kingdom: CAB international, 1991.
MLA Edition CitationGiller,Ken E, and wilson,kate j. Nitrogen Fixation in Tropical Croping Systems. CAB international, 1991.
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