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  1. Farming in Cumberland County in the claypan region of Southern Illinois : a study of the effect of differences in soil and topography /
    By: Ross, R. C. (Robert Cooke), - Fielder, Virgil Byron. - Walter, George Hays.
    Publication info: Urbana, Ill. :University of Illinois Agricultural Experiment Station, in cooperation with Bureau of Agricultural Economics, U.S. Dept. of Agriculture,1944.
    Holding Institution: University Library, University of Illinois Urbana Champaign
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