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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Canada. Botany and Plant Pathology Division. - Gillett, John M. (John Montague),
    Publication info: Ottawa, 1958
    Holding Institution: Smithsonian Libraries and Archives
  2. By: Canada. Botany and Plant Pathology Division. - Craigie, J. H.
    Publication info: Ottawa, [Queen's Printer], 1957
    Holding Institution: Agriculture and Agri-Food Canada (AAFC)