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  1. By: Threlfall, William
    Type: Article
    In: The Canadian field-naturalist
    Volume: 83
    Issue: 4
    Date: 1969
    Page Range: 384--388
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  2. By: Threlfall, William
    Type: Article
    In: The Canadian field-naturalist
    Volume: 92
    Issue: 3
    Date: 1978
    Page Range: 287--287
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  3. By: Threlfall, William
    Type: Article
    In: The Canadian field-naturalist
    Volume: 82
    Issue: 3
    Date: 1968
    Page Range: 176--180
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  4. By: Cannings, Richard J. (Richard James), - Threlfall, William
    Type: Article
    In: The Wilson bulletin
    Volume: 93
    Issue: 4
    Date: 1981
    Page Range: 519--530
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-
  5. By: Threlfall, William - Bourgeois, Charles E. - Bain, Geoffrey A.
    Type: Article
    In: Proceedings of the Entomological Society of Washington
    Volume: 81
    Date: 1979
    Page Range: 327--328
    Publication Info: Washington, etc, Entomological Society of Washington,
  6. By: Bourgeois, Charles E. - Threlfall, William
    Type: Article
    In: Proceedings of the Entomological Society of Washington
    Volume: 83
    Date: 1981
    Page Range: 799--800
    Publication Info: Washington, etc, Entomological Society of Washington,
  7. By: Threlfall, William - Clase, Howard J. - Jackson, Bernard S.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 87
    Issue: 3
    Date: 1973
    Page Range: 311--311
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  8. By: Eveleigh, E S - Threlfall, William
    Type: Article
    In: Proceedings of the Entomological Society of Washington
    Volume: 76
    Date: 1974
    Page Range: 270--277
    Publication Info: Washington, etc, Entomological Society of Washington,
  9. By: Threlfall, William
    Type: Article
    In: The veliger
    Volume: 29
    Date: 1986
    Page Range: 231--234
    Publication Info: Berkeley, CA, California Malacozoological Society,
  10. By: Threlfall, William
    Type: Article
    In: The Canadian field-naturalist
    Volume: 81
    Issue: 3
    Date: 1967
    Page Range: 168--172
    Publication Info: Ottawa Ottawa Field-Naturalists' Club