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By: Sugden, Lawson GType: ArticleIn: The Wilson bulletinVolume: 91Series:Issue: 4Date: 1979Page Range: 599--607Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-Subjects:
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By: Sugden, Lawson GType: ArticleIn: The Canadian field-naturalistVolume: 91Series:Issue: 4Date: 1977Page Range: 372--376Publication Info: Ottawa Ottawa Field-Naturalists' ClubSubjects:
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By: Sugden, Lawson G - Thurlow, William J. - Harris, Robert D. - Vermer, KeesType: ArticleIn: The Canadian field-naturalistVolume: 88Series:Issue: 3Date: 1974Page Range: 303--311Publication Info: Ottawa Ottawa Field-Naturalists' ClubSubjects:
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By: Wobeser, Gary - Gajadhar, Alvin - Beyersbergen, Gerry W. - Sugden, Lawson GType: ArticleIn: The Canadian field-naturalistVolume: 95Series:Issue: 4Date: 1981Page Range: 471--473Publication Info: Ottawa Ottawa Field-Naturalists' ClubSubjects:
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By: Sugden, Lawson GType: ArticleIn: The Canadian field-naturalistVolume: 74Series:Issue: 3Date: 1960Page Range: 163--163Publication Info: Ottawa Ottawa Field-Naturalists' ClubSubjects:
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By: Sugden, Lawson GType: ArticleIn: The Canadian field-naturalistVolume: 85Series:Issue: 4Date: 1971Page Range: 324--325Publication Info: Ottawa Ottawa Field-Naturalists' ClubSubjects: