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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Knowles, Robert Patrick, - Baron, Vernon Samuel. - McCartney, D. H. - Canada. Agriculture Canada. Research Program Services Section.
    Publication info: Ottawa, Agriculture Canada, c1993
    Holding Institution: Agriculture and Agri-Food Canada (AAFC)
  2. By: Knowles, Robert Patrick, - Canada. Agriculture Canada. Research Program Services Section.
    Publication info: Agriculture Canada, c1993
    Holding Institution: Agriculture and Agri-Food Canada (AAFC)