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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Allen, Robert Porter,
    Publication info: New York, McGraw-Hill, [1957]
    Holding Institution: Prelinger Library
  1. By: Allen, Robert Porter, - Hamerstrom, Frederick N.,
    Type: Article
    In: The Wilson bulletin
    Volume: 59
    Issue: 2
    Date: 1947
    Page Range: 127--128
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-