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  1. By: Ballowitz, Emil,
    Publication info: Jena :Verlag von Gustav Fischer,1899.
    Holding Institution: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library
  2. By: Ballowitz, Emil,
    Publication info: Jena :G. Fischer,1903.
    Holding Institution: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library