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  1. By: DeLong, Robert L. - Brownell, R. L. Jr.
    Publication info: 1968
    Holding Institution: Smithsonian Institution Archives
    BHL Collections: BHL Field Notes Project | Smithsonian Field Books collection
  2. By: Woodward, Paul W. - Brownell, R. L. Jr.
    Publication info: 1968
    Holding Institution: Smithsonian Institution Archives
    BHL Collections: BHL Field Notes Project | Smithsonian Field Books collection