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  1. The plants of Prince Edward Island /
    By: Erskine, D. S. - Plant Research Institute (Canada)
    Publication info: Ottawa :Plant Research Institute, Research Branch, Canada Dept. of Agriculture,1960.
    Contributed by: Agriculture and Agri-Food Canada (archive.org)
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  2. The plants of Prince Edward Island /
    By: Erskine, D. S.
    Edition: Repr. with new records, nomenclatural changes, and corrections and deletions / P.M. Catling, D.S. Erskine, R.B. MacLaren.
    Publication info: Ottawa :Research Branch, Agriculture Canada,1985.
    Contributed by: Agriculture and Agri-Food Canada (archive.org)
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