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  1. By: American Museum of Natural History. Department of Public Education. - Ramsey, Grace Fisher,
    Publication info: New York, The American Museum of Natural History, 1931
    Holding Institution: American Museum of Natural History Library
  2. By: Ramsey, Grace Fisher,
    Publication info: New York, N.Y, Dept. of Education, American Museum of Natural History, 1934
    Holding Institution: American Museum of Natural History Library