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  1. By: Silberglied, Robert E.
    Publication info: 1967
    Holding Institution: Smithsonian Institution Archives
    BHL Collections: Smithsonian Field Books collection
  2. By: Silberglied, Robert E.
    Publication info: 1965
    Holding Institution: Smithsonian Institution Archives
    BHL Collections: Smithsonian Field Books collection
  3. By: Silberglied, Robert E.
    Publication info: 1970
    Holding Institution: Smithsonian Institution Archives
    BHL Collections: Smithsonian Field Books collection
  4. By: Silberglied, Robert E.
    Publication info: 1967-1971
    Holding Institution: Smithsonian Institution Archives
    BHL Collections: Smithsonian Field Books collection