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  1. By: Westoll, T. Stanley.
    Publication info: 1944
    Holding Institution: American Museum of Natural History Library
  2. By: Romer, Alfred Sherwood, - Westoll, T. Stanley.
    Publication info: 1939
    Holding Institution: American Museum of Natural History Library
  3. By: Westoll, T. Stanley. - Romer, Alfred Sherwood,
    Publication info: New York City, The American Museum of Natural History, [1939]
    Holding Institution: American Museum of Natural History Library