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  1. By: Adams, E P
    Type: Article
    In: Proceedings of the American Philosophical Society held at Philadelphia for promoting useful knowledge.
    Volume: 59
    Issue: 220
    Date: 1920
    Page Range: 176--183
    Publication info: Philadelphia :American Philosophical Society
  2. By: Adams, E P
    Type: Article
    In: Proceedings of the American Philosophical Society held at Philadelphia for promoting useful knowledge.
    Volume: 54
    Issue: 216
    Date: 1915
    Page Range: 47--51
    Publication info: Philadelphia :American Philosophical Society
  3. By: Adams, E P
    Type: Article
    In: Proceedings of the American Philosophical Society held at Philadelphia for promoting useful knowledge.
    Volume: 49
    Issue: 197
    Date: 1910
    Page Range: 364--369
    Publication info: Philadelphia :American Philosophical Society