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  1. By: Dekker, Dick - Drever, Mark
    Type: Article
    In: The Canadian field-naturalist
    Volume: 129
    Issue: 2
    Date: 2015-08-04
    Page Range: 159--164
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  2. By: Drever, Mark - Harestad, Alton S.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 112
    Issue: 4
    Date: 1998
    Page Range: 676--683
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  3. By: Tranquilla, Laura A Mcfarlane - Yen, Peggy P.-W. - Bradley, Russell W - Vanderkist, Brett A - Lank, David B - Parker, Nadine R - Drever, Mark - Lougheed, Lynn W - Kaiser, Gary W - Williams, Tony D
    Type: Article
    In: The Wilson bulletin
    Volume: 115
    Issue: 4
    Date: 2003
    Page Range: 374--381
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-