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Cover of University of Illinois Agricultural Experiment Station Bulletin No. 94: Nitrogen Bacteria and LegumesWith special reference to red clover, cowpeas, soy beans,alfalfa, and sweet clover, on Illinois soils

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University of Illinois Agricultural Experiment Station Bulletin No. 94: Nitrogen Bacteria and LegumesWith special reference to red clover, cowpeas, soy beans,alfalfa, and sweet clover, on Illinois soils

Cyril G. (Cyril George) Hopkins

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