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  1. By: Barclay-Estrup, P. - Hess, G. V.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 88
    Issue: 2
    Date: 1974
    Page Range: 217--219
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  2. By: Barclay-Estrup, P. - Sims, Richard A.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 93
    Issue: 2
    Date: 1979
    Page Range: 139--143
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  3. By: Barclay-Estrup, P. - Duralia, T E - Harris, A G
    Type: Article
    In: Rhodora
    Volume: 93
    Date: 1991
    Page Range: 141--147
    Publication Info: [Cambridge, Mass., etc.], New England Botanical Club [etc.],
  4. By: Barclay-Estrup, P.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 86
    Issue: 1
    Date: 1972
    Page Range: 91--95
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  5. By: Barclay-Estrup, P.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 101
    Issue: 4
    Date: 1997
    Page Range: 526--531
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  6. By: Barclay-Estrup, P. - Nuttall, D. V.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 88
    Issue: 2
    Date: 1974
    Page Range: 171--181
    Publication Info: Ottawa Ottawa Field-Naturalists' Club