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  1. By: Woelfl, Manfred - Woelfl, Sybille
    Type: Article
    In: The Canadian field-naturalist
    Volume: 108
    Issue: 4
    Date: 1994
    Page Range: 495--496
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  2. By: Woelfl, Manfred - Woelfl, Sybille
    Type: Article
    In: The Canadian field-naturalist
    Volume: 108
    Issue: 4
    Date: 1994
    Page Range: 494--494
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  3. By: Woelfl, Sybille - Woelfl, Manfred
    Type: Article
    In: The Canadian field-naturalist
    Volume: 111
    Issue: 2
    Date: 1997
    Page Range: 200--203
    Publication Info: Ottawa Ottawa Field-Naturalists' Club