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  1. By: International Botanical Congress (2nd : Vienna, Austria)
    Publication info: Wien, Selbstverlage des Organisationskomitees, 1905
    Holding Institution: New York Botanical Garden, LuEsther T. Mertz Library
  2. By: International Botanical Congress (2nd : Vienna, Austria) - Lotsy, Johannes Paulus,
    Publication info: Jena, G. Fischer, 1906
    Holding Institution: Boston Public Library
  3. By: International Botanical Congress (2nd : Vienna, Austria)
    Publication info: Jena, G. Fischer, 1906
    Holding Institution: New York Botanical Garden, LuEsther T. Mertz Library