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  1. By: Armstrong, Robert Pierson.
    Publication info: 1916
    Holding Institution: UMass Amherst Libraries
  1. By: Armstrong, Robert Pierson.
    Type: Article
    In: Field Museum of Natural History bulletin
    Volume: 45
    Issue: 3
    Date: 1974
    Page Range: 3--16
    Publication Info: [Chicago, Ill.], The Museum, [1972]-©1990