dcsimg
Please read BHL's Acknowledgment of Harmful Content
Sort By:
  1. By: Keller, Harry F - Maas, Philip
    Type: Article
    In: Proceedings of the American Philosophical Society held at Philadelphia for promoting useful knowledge
    Volume: 43
    Issue: 176
    Date: 1904
    Page Range: 105--112
    Publication Info: Philadelphia, American Philosophical Society,
  2. By: Keller, Harry F
    Type: Article
    In: Proceedings of the American Philosophical Society held at Philadelphia for promoting useful knowledge
    Volume: 47
    Issue: 188
    Date: 1908
    Page Range: 79--85
    Publication Info: Philadelphia, American Philosophical Society,
  3. By: Keller, Harry F
    Type: Article
    In: Proceedings of the American Philosophical Society held at Philadelphia for promoting useful knowledge
    Volume: 48
    Issue: 191
    Date: 1909
    Page Range: 65--66
    Publication Info: Philadelphia, American Philosophical Society,