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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Oliver, Robert Wayne. - Canada. Agriculture Canada
    Publication info: Ottawa, Agriculture Canada, 1976 (1980 impression)
    Holding Institution: Agriculture and Agri-Food Canada (AAFC)
  2. By: Oliver, Robert Wayne. - Canada. Department of Agriculture.
    Publication info: Ottawa, Canada Dept. of Agriculture, 1957 (1978 printing)
    Holding Institution: Agriculture and Agri-Food Canada (AAFC)