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  1. By: Jamieson, C O - Wollenweber, Hans Wilhelm,
    Type: Article
    In: Journal of the Washington Academy of Sciences
    Volume: 2
    Date: 1912
    Page Range: 146--152
    Publication Info: Washington [etc Washington Academy of Sciences]
  2. By: Wollenweber, Hans Wilhelm,
    Type: Article
    In: Berichte der Deutschen Botanischen Gesellschaft
    Volume: 31
    Date: 1913
    Page Range: 17--34
    Publication Info: Berlin, Gebrüder Borntræger, 1883-1987