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  1. Control of horse flies on cattle [by] Willis N. Bruce and George C. Decker.
    By: Bruce, Willis Nels. - Decker, G. C.
    Publication info: Urbana,1951.
    Contributed by: University of Illinois Urbana Champaign
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  2. Significance of pesticide residues : practical factors in persistence.
    By: Decker, G. C. - Illinois.
    Publication info: Urbana,1966.
    Contributed by: University of Illinois Urbana Champaign
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