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  1. By: Johnson, H P
    Type: Article
    In: Proceedings of the California Academy of Sciences
    Volume: 1
    Date: 1897
    Page Range: 153--198
    Publication Info: San Francisco, Calif, The Academy, 1897-
  2. By: Johnson, H P
    Type: Article
    In: The Auk
    Volume: 5
    Date: 1888
    Page Range: 116--116
    Publication Info: Washington, D.C, American Ornithologists' Union, etc, 1884-