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Books by "Hopkins, Cyril G. (Cyril George)": Newest
3 of 3 books
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Nitrogen Bacteria and Legumes With special reference to red clover, cowpeas, soy beans, alfalfa, and sweet clover, on Illinois soils
Hopkins, Cyril G. (Cyril George)
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The Story of the Soil; from the Basis of Absolute Science and Real Life
Hopkins, Cyril G. (Cyril George)
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The Farm That Won't Wear Out
Hopkins, Cyril G. (Cyril George)