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  1. By: Graebner, Paul,
    Publication info: Berlin, Gebr. Borntraeger, 1903
    Holding Institution: New York Botanical Garden, LuEsther T. Mertz Library
    Subjects: Germany, Northern  Identification  Plants  
  2. By: Maske, Erich,
    Publication info: Alfeld, P. Dobler, [1906]
    Holding Institution: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library
    Subjects: Ammonoidea  Cephalopoda, Fossil  Germany, Northern  Mollusks, Fossil  Paloeontology  Stratigraphic