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By: Weatherhead, Patrick J - Robertson, Raleigh JType: ArticleIn: The Wilson bulletinVolume: 89Series:Issue: 4Date: 1977Page Range: 583--592Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-Subjects:
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By: Weatherhead, Patrick J - Clark, Robert G. - Bider, J. Roger - Titman, Rodger DType: ArticleIn: The Canadian field-naturalistVolume: 94Series:Issue: 1Date: 1980Page Range: 75--79Publication Info: Ottawa Ottawa Field-Naturalists' ClubSubjects:
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By: Bendell, Barry E. - Weatherhead, Patrick JType: ArticleIn: The Canadian field-naturalistVolume: 96Series:Issue: 3Date: 1982Page Range: 265--271Publication Info: Ottawa Ottawa Field-Naturalists' ClubSubjects: