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  1. By: Fries, B Fr
    Type: Article
    In: Archiv für Naturgeschichte
    Volume: 4
    Issue: 1
    Date: 1838
    Page Range: 236--250
    Publication Info: Berlin, Nicolai, 1835-
  2. By: Fries, B Fr
    Type: Article
    In: Archiv für Naturgeschichte
    Volume: 4
    Issue: 1
    Date: 1838
    Page Range: 251--256
    Publication Info: Berlin, Nicolai, 1835-
  3. By: Fries, B Fr
    Type: Article
    In: Annals of natural history
    Volume: 2
    Date: 1838
    Page Range: 96--105
    Publication Info: London, R. and J.E. Taylor,