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  1. By: Hays, I Minis
    Type: Article
    In: Proceedings of the American Philosophical Society held at Philadelphia for promoting useful knowledge
    Volume: 37
    Issue: 157
    Date: 1898
    Page Range: 143--150
    Publication Info: Philadelphia, American Philosophical Society,
  2. By: Hays, I Minis
    Type: Article
    In: Proceedings of the American Philosophical Society held at Philadelphia for promoting useful knowledge
    Volume: 37
    Issue: 157
    Date: 1898
    Page Range: 88--107
    Publication Info: Philadelphia, American Philosophical Society,
  3. By: Hays, I Minis
    Type: Article
    In: Proceedings of the American Philosophical Society held at Philadelphia for promoting useful knowledge
    Volume: 38
    Issue: 159
    Date: 1899
    Page Range: 4--6
    Publication Info: Philadelphia, American Philosophical Society,