ELKAN, G. H. (1987). SYMBIOTIC NITROGENFIXATION TECHNOLOGY.
Chicago Edition CitationELKAN, GERALD H. SYMBIOTIC NITROGENFIXATION TECHNOLOGY. NEW YORK, MARCEL DEKKER, 1987.
MLA Edition CitationELKAN, GERALD H. SYMBIOTIC NITROGENFIXATION TECHNOLOGY. 1987.
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