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  1. A history of the entomology and plant pathology laboratories on the Niagara peninsula, 1911-1960 /
    By: Dustan, G. Gordon. - Willison, R. S.
    Publication info: [Ottawa]Canada Dept. of Agriculture [R. Duhamel, Queen's printer]1968
    Holding Institution: Agriculture and Agri-Food Canada (archive.org)
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  2. Preventing peach canker.
    By: Willison, R. S. - Canada. Dept. of Agriculture.
    Publication info: Division of Botany,1935.
    Holding Institution: Agriculture and Agri-Food Canada (archive.org)
    View Book