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  1. By: American Museum of Natural History. Frick Laboratories. - Falkenbach, Charles H. - Schultz, C. Bertrand (Charles Bertrand), - University of Nebraska State Museum.
    Publication info: 1954
    Holding Institution: American Museum of Natural History Library
  2. By: American Museum of Natural History. Frick Laboratories. - Falkenbach, Charles H. - Schultz, C. Bertrand (Charles Bertrand), - University of Nebraska State Museum.
    Publication info: 1956
    Holding Institution: American Museum of Natural History Library
  3. By: American Museum of Natural History. Frick Laboratories. - Falkenbach, Charles H. - Schultz, C. Bertrand (Charles Bertrand), - University of Nebraska State Museum.
    Publication info: 1968
    Holding Institution: American Museum of Natural History Library