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  1. The spring grain-aphis or "green bug" /
    By: Webster, F. M. - Phillips, W. J.
    Publication info: Washington, D.C. :U.S. Dept. of Agriculture, Bureau of Entomology,1912.
    Contributed by: U.S. Department of Agriculture, National Agricultural Library
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  2. The spring grain-aphis or "green bug."
    By: Webster, F. M. - Phillips, W. J.
    Publication info: Washington,Govt. print. off.,1912.
    Contributed by: Library of Congress
    BHL Collections: Library of Congress
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