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  1. Directions for constructing vats and dipping cattle to destroy ticks /
    By: Graybill, Harry Webster. - Ellenberger, William Penn,
    Publication info: Washington, D.C.Government Printing Office,1915.
    Contributed by: University of Florida, George A. Smathers Libraries
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  2. Studies on the biology of the Texas-fever tick. (Supplementary report.) By H. W. Graybill ... and W. M. Lewallen.
    By: Graybill, Harry Webster. - Lewallen, W. M.,
    Publication info: Washington,Govt. print. off.,1912.
    Contributed by: Library of Congress
    BHL Collections: Library of Congress
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