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  1. 1
    An important enemy to fruit trees : the San Jose scale ; its appearance in the eastern United States ; measures to be taken to prevent its spread and to destroy it /

    An important enemy to fruit trees : the San Jose scale ; its appearance in the eastern United States ; measures to be taken to prevent its spread and to destroy it / by Howard, L. O. (Leland Ossian), 1857-1950

    Published 1893
    Government Document Book
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  2. 2
    The Howard scale

    The Howard scale by Taylor, E. P. (Estes Park), 1879-

    Published 1907
    Online Access
    Government Document Electronic eBook
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  3. 3
    The San Jose or Chinese scale /

    The San Jose or Chinese scale / by Marlatt, C. L.

    Published 1906
    Government Document Book
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  4. 4
    The Howard scale /

    The Howard scale / by Taylor, E. P. (Estes Park), 1879-

    Published 1907
    Government Document Book
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