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  1. By: Hinrichs, Gustavus
    Type: Article
    In: Proceedings of the American Philosophical Society held at Philadelphia for promoting useful knowledge
    Volume: 52
    Issue: 211
    Date: 1913
    Page Range: 543--557
    Publication Info: Philadelphia, American Philosophical Society,
  2. By: Hinrichs, Gustavus
    Type: Article
    In: Proceedings of the American Philosophical Society held at Philadelphia for promoting useful knowledge
    Volume: 49
    Issue: 197
    Date: 1910
    Page Range: 359--363
    Publication Info: Philadelphia, American Philosophical Society,