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  1. By: Bird, William, - Merrill, Selah, - Whitfield, R. P. (Robert Parr),
    Publication info: 1891
    Holding Institution: American Museum of Natural History Library
  1. By: Merrill, Selah,
    Type: Article
    In: Ibis
    Volume: 3
    Series: 8
    Issue: 3
    Date: 1903
    Page Range: 324--330
    Publication Info: [London], Published for the British Ornithologists' Union by Academic Press,