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  1. By: Heilprin, Angelo
    Type: Article
    In: Proceedings of the Academy of Natural Sciences of Philadelphia
    Volume: 43
    Date: 1891
    Page Range: 136--158
    Publication Info: Philadelphia, Academy of Natural Sciences of Philadelphia,
  2. By: Heilprin, Angelo
    Type: Article
    In: Proceedings of the Academy of Natural Sciences of Philadelphia
    Volume: 33
    Date: 1881
    Page Range: 151--159
    Publication Info: Philadelphia, Academy of Natural Sciences of Philadelphia,
  3. By: Heilprin, Angelo
    Type: Article
    In: Proceedings of the American Philosophical Society held at Philadelphia for promoting useful knowledge
    Volume: 29
    Issue: 136
    Date: 1891
    Page Range: 137--144
    Publication Info: Philadelphia, American Philosophical Society,
  4. By: Heilprin, Angelo
    Type: Article
    In: Proceedings of the Academy of Natural Sciences of Philadelphia
    Volume: 32
    Date: 1880
    Page Range: 20--33
    Publication Info: Philadelphia, Academy of Natural Sciences of Philadelphia,
  5. By: Heilprin, Angelo
    Type: Article
    In: Proceedings of the Academy of Natural Sciences of Philadelphia
    Volume: 33
    Date: 1881
    Page Range: 416--422
    Publication Info: Philadelphia, Academy of Natural Sciences of Philadelphia,
  6. By: Heilprin, Angelo
    Type: Article
    In: Proceedings of the Academy of Natural Sciences of Philadelphia
    Volume: 33
    Date: 1881
    Page Range: 448--453
    Publication Info: Philadelphia, Academy of Natural Sciences of Philadelphia,
  7. By: Heilprin, Angelo
    Type: Article
    In: Proceedings of the American Philosophical Society held at Philadelphia for promoting useful knowledge
    Volume: 30
    Issue: 137
    Date: 1892
    Page Range: 4--22
    Publication Info: Philadelphia, American Philosophical Society,