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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Shelton, Philip C. (Philip Clarence),
    Publication info: 1967
    Holding Institution: Smithsonian Institution Archives
    BHL Collections: BHL Field Notes Project | Smithsonian Field Books collection
  2. By: Shelton, Philip C. (Philip Clarence), - Huber, L. N.
    Publication info: 1969
    Holding Institution: Smithsonian Institution Archives
    BHL Collections: Smithsonian Field Books collection