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  1. By: Winkler, Hans,
    Publication info: Jena :G. Fischer,1908.
    Holding Institution: New York Botanical Garden, LuEsther T. Mertz Library
    BHL Collections: New York Botanical Garden
  2. By: Winkler, Hans,
    Publication info: Jena :G. FIscher,1920.
    Holding Institution: MBLWHOI Library