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  1. By: Morris, Robert Oliver,
    Publication info: Springfield, 1914
    Holding Institution: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library
  2. By: Morris, Robert O. - Morris, Robert Oliver,
    Publication info: Springfield, Mass, H.R. Johnson, 1901
    Holding Institution: Multiple institutions
  3. By: Morris, Robert Oliver,
    Publication info: Springfield, Mass, H. R. Johnson, 1901
    Holding Institution: University of California Libraries
  4. By: Morris, Robert Oliver,
    Holding Institution: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library
  5. By: Morris, Robert Oliver, - Brewster, William,
    Holding Institution: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library
    BHL Collections: William Brewster Papers