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  1. By: Soper, J Dewey - Pearse, Theed - Guthrie, David
    Type: Article
    In: The Canadian field-naturalist
    Volume: 48
    Issue: 3
    Date: 1934-03
    Page Range: 52--52
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  2. By: Pearse, Theed
    Type: Article
    In: The Canadian field-naturalist
    Volume: 37
    Issue: 7
    Date: 1923-10
    Page Range: 132--135
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  3. By: Pearse, Theed
    Type: Article
    In: The Canadian field-naturalist
    Volume: 60
    Issue: 6
    Date: 1946
    Page Range: 133--133
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  4. By: Pearse, Theed
    Type: Article
    In: The Canadian field-naturalist
    Volume: 71
    Issue: 1
    Date: 1957
    Page Range: 34--34
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  5. By: Brooks, Allan - Pearse, Theed
    Type: Article
    In: The Canadian field-naturalist
    Volume: 43
    Issue: 5
    Date: 1929-05
    Page Range: 107--107
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  6. By: Pearse, Theed
    Type: Article
    In: The Canadian field-naturalist
    Volume: 62
    Issue: 4
    Date: 1948
    Page Range: 125--126
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  7. By: Munro, J A - Simpson, G. Buchanan - Pearse, Theed - Dale, E. M. S. - The Hamilton Bird Protection Society Inc - Thompson, Stuart L. - Calvert, E. W. - DeLury, Ralph E. - Terrill, Lewis McIver - Lord, J. S.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 39
    Issue: 1
    Date: 1925-01
    Page Range: 21--25
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  8. By: Pearse, Theed
    Type: Article
    In: The Canadian field-naturalist
    Volume: 38
    Issue: 10
    Date: 1924-12
    Page Range: 193--193
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  9. By: Pearse, Theed
    Type: Article
    In: The Canadian field-naturalist
    Volume: 74
    Issue: 1
    Date: 1960
    Page Range: 53--54
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  10. By: Pearse, Theed
    Type: Article
    In: The Canadian field-naturalist
    Volume: 67
    Issue: 2
    Date: 1953
    Page Range: 94--94
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  11. By: Pearse, Theed
    Type: Article
    In: The Canadian field-naturalist
    Volume: 51
    Issue: 3
    Date: 1937-03
    Page Range: 42--44
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  12. By: Pearse, Theed
    Type: Article
    In: The Canadian field-naturalist
    Volume: 74
    Issue: 1
    Date: 1960
    Page Range: 54--54
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  13. By: Pearse, Theed
    Type: Article
    In: The Canadian field-naturalist
    Volume: 57
    Issue: 4-5
    Date: 1943
    Page Range: 96--96
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  14. By: Pearse, Theed
    Type: Article
    In: The Canadian field-naturalist
    Volume: 61
    Issue: 1
    Date: 1947
    Page Range: 22--22
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  15. By: Pearse, Theed
    Type: Article
    In: The Canadian field-naturalist
    Volume: 59
    Issue: 2
    Date: 1945
    Page Range: 66--67
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  16. By: Pearse, Theed
    Type: Article
    In: The Canadian field-naturalist
    Volume: 64
    Issue: 2
    Date: 1950
    Page Range: 94--94
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  17. By: Pearse, Theed
    Type: Article
    In: The Canadian field-naturalist
    Volume: 43
    Issue: 1
    Date: 1929-01
    Page Range: 9--10
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  18. By: Pearse, Theed
    Type: Article
    In: The Canadian field-naturalist
    Volume: 47
    Issue: 3
    Date: 1933-03
    Page Range: 59--59
    Publication Info: Ottawa Ottawa Field-Naturalists' Club