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  1. Class book of economic entomology with special reference to the economic insects of the northern United States and Canada /
    By: Lochhead, William,
    Publication info: Philadelphia :P. Blakiston's Son,c1919.
    Contributed by: Canadiana.org (archive.org)
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  2. Class book of economic entomology, with special reference to the economic insects of the northern United States and Canada, by William Lochhead ... with 257 illustrations.
    By: Lochhead, William,
    Publication info: Philadelphia,Blakiston[c1919]
    Contributed by: Smithsonian Libraries
    BHL Collections: Smithsonian Libraries
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  3. The Hessian fly in Ontario
    By: Lochhead, William, - Ontario Agricultural College.
    Publication info: Toronto :Dept. of Agriculture,[1901]
    Contributed by: Canadiana.org (archive.org)
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  4. The present condition of the San José scale in Ontario
    By: Lochhead, William, - Ontario Agricultural College.
    Publication info: Toronto :Dept. of Agriculture,[1903]
    Contributed by: Canadiana.org (archive.org)
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