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  1. The natural control of the fall webworm (Hyphantria cunea Drury) in Canada : together with an account of its several parasites /
    By: Tothill, John D. (John Douglas), - Canada. Dept. of Agriculture.
    Publication info: Ottawa :F.A. Acland, King's Printer,1922.
    Holding Institution: Agriculture and Agri-Food Canada (archive.org)
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