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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Colbert, Edwin H. - Salkin, Robert.
    Publication info: New York, N.Y American Museum of Natural History [1965]
    Holding Institution: American Museum of Natural History Library
  2. By: Colbert, Edwin H. - Salkin, Robert.
    Publication info: 1965
    Holding Institution: American Museum of Natural History Library