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Nitrogen fixation with non-legumes : the sixth International Symposium on Nitrogen Fixation with Non-legumes, Ismailia, Egypt, 6-10 September 1993 / edited by N.A. Hegazi, M. Fayez and M. Monib.
- 572.545 N731
- International Symposium on Nitrogen Fixation with Non-legumes (6th : 1993 : Ismailia, Egypt),
- American University in Cairo Press,
- Cairo :