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  1. By: Ulke, Titus
    Type: Article
    In: The Canadian field-naturalist
    Volume: 37
    Issue: 3
    Date: 1923-03
    Page Range: 54--55
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  2. By: Ulke, Titus
    Type: Article
    In: The Canadian field-naturalist
    Volume: 49
    Issue: 6
    Date: 1935-09
    Page Range: 108--109
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  3. By: Ulke, Titus
    Type: Article
    In: The Canadian field-naturalist
    Volume: 49
    Issue: 3
    Date: 1935-03
    Page Range: 49--55
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  4. By: Ulke, Titus
    Type: Article
    In: The Canadian field-naturalist
    Volume: 49
    Issue: 4
    Date: 1935-04
    Page Range: 71--76
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  5. By: Ulke, Titus
    Type: Article
    In: Torreya
    Volume: 38
    Issue: 3
    Date: 1938
    Page Range: 57--62
    Publication Info: Burlington, Vt, Torrey Botanical Club, 1901-1945
  6. By: Ulke, Titus
    Type: Article
    In: The Canadian field-naturalist
    Volume: 37
    Issue: 4
    Date: 1923-04
    Page Range: 62--64
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  7. By: Ulke, Titus
    Type: Article
    In: Torreya
    Volume: 41
    Issue: 4
    Date: 1941
    Page Range: 111--112
    Publication Info: Burlington, Vt, Torrey Botanical Club, 1901-1945