dcsimg
Please read BHL's Acknowledgment of Harmful Content
 The custom PDF generation service is currently experiencing technical difficulties.  Thank you for your patience.
Sort By:
  1. By: Heilprin, A
    Type: Article
    In: Proceedings of the Academy of Natural Sciences of Philadelphia
    Volume: 40
    Date: 1888
    Page Range: 302--328
    Publication Info: Philadelphia, Academy of Natural Sciences of Philadelphia,