Nitrogen fixation proceedings of the fifth International Symposium on Nitrogen Fixation with Non-legumes, Florence, Italy, 10-14 September 1990 - International Symposium on Nitrogen Fixation with Non-legumes (5th : 1990 : Florence, Italy).; Polsinelli, M. (Mario).; Materassi, R.; Vincenzini, M. (Dordrecht : Kluwer Academic Publishers, 1991)
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Keywords: Nitrogen -- Fixation -- Congresses; Nitrogen -- fixing microogranisms -- Congresses