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  1. By: Edwards, R. York
    Type: Article
    In: The Canadian field-naturalist
    Volume: 95
    Issue: 3
    Date: 1981
    Page Range: 373--374
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  2. By: Edwards, R. York
    Type: Article
    In: The Canadian field-naturalist
    Volume: 85
    Issue: 2
    Date: 1971
    Page Range: 197--198
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  3. By: Edwards, R. York
    Type: Article
    In: The Canadian field-naturalist
    Volume: 103
    Issue: 2
    Date: 1989
    Page Range: 310--311
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  4. By: Barkley, William D. - Edwards, R. York
    Type: Article
    In: The Canadian field-naturalist
    Volume: 85
    Issue: 1
    Date: 1971
    Page Range: 1--2
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  5. By: Edwards, R. York
    Type: Article
    In: The Canadian field-naturalist
    Volume: 102
    Issue: 1
    Date: 1988
    Page Range: 193--193
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  6. By: Edwards, R. York
    Type: Article
    In: The Canadian field-naturalist
    Volume: 93
    Issue: 1
    Date: 1979
    Page Range: 6--9
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  7. By: Edwards, R. York
    Type: Article
    In: The Canadian field-naturalist
    Volume: 103
    Issue: 3
    Date: 1989
    Page Range: 451--452
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  8. By: Edwards, R. York
    Type: Article
    In: The Canadian field-naturalist
    Volume: 103
    Issue: 3
    Date: 1989
    Page Range: 456--456
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  9. By: Edwards, R. York
    Type: Article
    In: The Canadian field-naturalist
    Volume: 84
    Issue: 3
    Date: 1970
    Page Range: 326--327
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  10. By: Edwards, R. York
    Type: Article
    In: The Canadian field-naturalist
    Volume: 85
    Issue: 2
    Date: 1971
    Page Range: 199--199
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  11. By: Edwards, R. York - Ritcey, Ralph W.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 74
    Issue: 1
    Date: 1960
    Page Range: 3--7
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  12. By: Edwards, R. York
    Type: Article
    In: The Canadian field-naturalist
    Volume: 103
    Issue: 3
    Date: 1989
    Page Range: 466--466
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  13. By: Edwards, R. York
    Type: Article
    In: The Canadian field-naturalist
    Volume: 84
    Issue: 3
    Date: 1970
    Page Range: 326--326
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  14. By: Edwards, R. York
    Type: Article
    In: The Canadian field-naturalist
    Volume: 97
    Issue: 3
    Date: 1983
    Page Range: 362--362
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  15. By: Edwards, R. York - Ritcey, Ralph W.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 73
    Issue: 1
    Date: 1959
    Page Range: 21--25
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  16. By: Edwards, R. York
    Type: Article
    In: The Canadian field-naturalist
    Volume: 85
    Issue: 2
    Date: 1971
    Page Range: 198--199
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  17. By: Edwards, R. York
    Type: Article
    In: The Canadian field-naturalist
    Volume: 102
    Issue: 4
    Date: 1988
    Page Range: 763--764
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  18. By: Edwards, R. York
    Type: Article
    In: The Canadian field-naturalist
    Volume: 104
    Issue: 3
    Date: 1990
    Page Range: 513--513
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  19. By: Stirling, D - Edwards, R. York
    Type: Article
    In: The Canadian field-naturalist
    Volume: 76
    Issue: 3
    Date: 1962
    Page Range: 147--152
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  20. By: Edwards, R. York
    Type: Article
    In: The Canadian field-naturalist
    Volume: 59
    Issue: 2
    Date: 1945
    Page Range: 49--50
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  21. By: Edwards, R. York
    Type: Article
    In: The Canadian field-naturalist
    Volume: 100
    Issue: 1
    Date: 1986
    Page Range: 153--154
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  22. By: Edwards, R. York
    Type: Article
    In: The Canadian field-naturalist
    Volume: 100
    Issue: 3
    Date: 1986
    Page Range: 453--454
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  23. By: Edwards, R. York
    Type: Article
    In: The Canadian field-naturalist
    Volume: 114
    Issue: 4
    Date: 2000
    Page Range: 712--715
    Publication Info: Ottawa Ottawa Field-Naturalists' Club