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By: Threlfall, WilliamType: ArticleIn: The Canadian field-naturalistVolume: 83Series:Issue: 4Date: 1969Page Range: 384--388Publication Info: Ottawa Ottawa Field-Naturalists' ClubSubjects:
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By: Threlfall, WilliamType: ArticleIn: The Canadian field-naturalistVolume: 92Series:Issue: 3Date: 1978Page Range: 287--287Publication Info: Ottawa Ottawa Field-Naturalists' ClubSubjects:
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By: Threlfall, WilliamType: ArticleIn: The Canadian field-naturalistVolume: 82Series:Issue: 3Date: 1968Page Range: 176--180Publication Info: Ottawa Ottawa Field-Naturalists' ClubSubjects:
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By: Cannings, Richard J. (Richard James), - Threlfall, WilliamType: ArticleIn: The Wilson bulletinVolume: 93Series:Issue: 4Date: 1981Page Range: 519--530Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-Subjects:
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By: Threlfall, William - Bourgeois, Charles E. - Bain, Geoffrey A.Type: ArticleIn: Proceedings of the Entomological Society of WashingtonVolume: 81Series:Issue:Date: 1979Page Range: 327--328Publication Info: Washington, etc, Entomological Society of Washington,Subjects:
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By: Bourgeois, Charles E. - Threlfall, WilliamType: ArticleIn: Proceedings of the Entomological Society of WashingtonVolume: 83Series:Issue:Date: 1981Page Range: 799--800Publication Info: Washington, etc, Entomological Society of Washington,Subjects:
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By: Threlfall, William - Clase, Howard J. - Jackson, Bernard S.Type: ArticleIn: The Canadian field-naturalistVolume: 87Series:Issue: 3Date: 1973Page Range: 311--311Publication Info: Ottawa Ottawa Field-Naturalists' ClubSubjects:
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By: Eveleigh, E S - Threlfall, WilliamType: ArticleIn: Proceedings of the Entomological Society of WashingtonVolume: 76Series:Issue:Date: 1974Page Range: 270--277Publication Info: Washington, etc, Entomological Society of Washington,Subjects:
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By: Threlfall, WilliamType: ArticleIn: The veligerVolume: 29Series:Issue:Date: 1986Page Range: 231--234Publication Info: Berkeley, CA, California Malacozoological Society,Subjects:
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By: Threlfall, WilliamType: ArticleIn: The Canadian field-naturalistVolume: 81Series:Issue: 3Date: 1967Page Range: 168--172Publication Info: Ottawa Ottawa Field-Naturalists' ClubSubjects: