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  1. Summary of Illinois soil investigations / by Cyril G. Hopkins, J.G. Mosier, and F.C. Bauer.
    By: Hopkins, Cyril G. - Bauer, F. C. - Mosier, J. G.
    Publication info: Urbana, Ill. :University of Illinois Agricultural Experiment Station,1916.
    Contributed by: University of Illinois Urbana Champaign
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