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  1. By: Svoboda, J
    Type: Article
    In: The Canadian field-naturalist
    Volume: 102
    Issue: 2
    Date: 1988
    Page Range: 408--408
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  2. By: Staniforth, Richard J. - Maycock, P F - Svoboda, J
    Type: Article
    In: Rhodora
    Volume: 93
    Date: 1991
    Page Range: 123--128
    Publication Info: [Cambridge, Mass., etc.] New England Botanical Club [etc.]
  3. By: Freedman, B. - Svoboda, J
    Type: Article
    In: The Canadian field-naturalist
    Volume: 96
    Issue: 1
    Date: 1982
    Page Range: 56--60
    Publication Info: Ottawa Ottawa Field-Naturalists' Club