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  1. Economies of size of Illinois cash-grain & hog farms / by Roy N. Van Arsdall and William A. Elder.
    By: Van Arsdall, Roy Neuman, - Elder, William A.
    Publication info: Urbana, Ill. :University of Illinois, College of Agriculture, Agricultural Experiment Station,1969.
    Contributed by: University of Illinois Urbana Champaign
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