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  1. By: Ryder, John P.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 90
    Issue: 4
    Date: 1976
    Page Range: 505--506
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  2. By: Ryder, John P.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 79
    Issue: 2
    Date: 1965
    Page Range: 155--155
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  3. By: Ryder, John P. - Boag, David A. (David Archibald),
    Type: Article
    In: The Canadian field-naturalist
    Volume: 95
    Issue: 1
    Date: 1981
    Page Range: 35--38
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  4. By: Ryder, John P.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 98
    Issue: 2
    Date: 1984
    Page Range: 266--267
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  5. By: Ryder, John P. - Ankney, C Davison
    Type: Article
    In: The Wilson bulletin
    Volume: 91
    Issue: 1
    Date: 1979
    Page Range: 157--159
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-
  6. By: Ryder, John P.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 88
    Issue: 3
    Date: 1974
    Page Range: 349--352
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  7. By: Ryder, John P. - Carroll, Timothy R.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 92
    Issue: 1
    Date: 1978
    Page Range: 51--54
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  8. By: Ryder, John P.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 85
    Issue: 2
    Date: 1971
    Page Range: 181--183
    Publication Info: Ottawa Ottawa Field-Naturalists' Club