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  1. The cankerworms /
    By: Porter, B. A. - Alden, Charles H.
    Publication info: Washington, D.C. :U.S. Dept. of Agriculture,1924.
    Contributed by: U.S. Department of Agriculture, National Agricultural Library
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  2. Dusting and spraying peach trees after harvest for control of the plum curculio /
    By: Snapp, Oliver I. - Alden, Charles H.
    Publication info: Washington, D.C. :U.S. Dept. of Agriculture,1924.
    Contributed by: U.S. Department of Agriculture, National Agricultural Library
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  3. Further studies with paradichlorobenzene for peach borer control : with special reference to its use on young peach trees /
    By: Snapp, Oliver I. - Alden, Charles H.
    Publication info: Washington, D.C. :U.S. Dept. of Agriculture,1923.
    Contributed by: U.S. Department of Agriculture, National Agricultural Library
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