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  1. By: Senn, Harold A. - Zinck, M. N.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 60
    Issue: 4
    Date: 1946
    Page Range: 92--94
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  2. By: Senn, Harold A.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 61
    Issue: 2
    Date: 1947
    Page Range: 70--70
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  3. By: Senn, Harold A.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 52
    Issue: 9
    Date: 1938-12
    Page Range: 127--128
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  4. By: Senn, Harold A.
    Type: Article
    In: Journal of the Arnold Arboretum
    Volume: 19
    Issue: 2
    Date: 1938
    Page Range: 153--157
    Publication Info: Cambridge, Mass Arnold Arboretum, Harvard University [etc.] 1919-
  5. By: Senn, Harold A.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 64
    Issue: 5
    Date: 1950
    Page Range: 190--190
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  6. By: Senn, Harold A.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 58
    Issue: 5
    Date: 1944
    Page Range: 177--180
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  7. By: Senn, Harold A.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 66
    Issue: 4
    Date: 1952
    Page Range: 114--115
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  8. By: Senn, Harold A.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 61
    Issue: 3
    Date: 1947
    Page Range: 118--118
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  9. By: Senn, Harold A.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 58
    Issue: 4
    Date: 1944
    Page Range: 125--125
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  10. By: Senn, Harold A.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 52
    Issue: 6
    Date: 1938-09
    Page Range: 94--94
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  11. By: Senn, Harold A.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 58
    Issue: 1
    Date: 1944
    Page Range: 30--30
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  12. By: Senn, Harold A.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 58
    Issue: 3
    Date: 1944
    Page Range: 105--105
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  13. By: Senn, Harold A.
    Type: Article
    In: Rhodora
    Volume: 41
    Date: 1939
    Page Range: 317--370
    Publication Info: [Cambridge, Mass., etc.] New England Botanical Club [etc.]
  14. By: Senn, Harold A.
    Type: Article
    In: Contributions from the Gray Herbarium of Harvard University
    Issue: 125
    Date: 1939
    Page Range: 317--367
    Publication Info: [Cambridge, Mass.] Harvard University -1984]
  15. By: Senn, Harold A.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 52
    Issue: 9
    Date: 1938-12
    Page Range: 132--133
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  16. By: Senn, Harold A.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 55
    Issue: 2
    Date: 1941-02
    Page Range: 17--19
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  17. By: Senn, Harold A.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 59
    Issue: 1
    Date: 1945
    Page Range: 38--38
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  18. By: Senn, Harold A.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 58
    Issue: 4
    Date: 1944
    Page Range: 125--125
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  19. By: Senn, Harold A.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 61
    Issue: 3
    Date: 1947
    Page Range: 118--118
    Publication Info: Ottawa Ottawa Field-Naturalists' Club