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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Harper, F
    Type: Article
    In: Proceedings of the Biological Society of Washington
    Volume: 69
    Date: 1956
    Page Range: 93--103
    Publication Info: Washington, Biological Society of Washington,
  2. By: Harper, F
    Type: Article
    In: The Nautilus
    Volume: 50
    Date: 1936
    Page Range: 37--40
    Publication Info: Melbourne, Fla., etc American Malacologists, inc., etc
  3. By: Harper, F
    Type: Article
    In: The Nautilus
    Volume: 55
    Date: 1941
    Page Range: 3--4
    Publication Info: Melbourne, Fla., etc American Malacologists, inc., etc
  4. By: Harper, F
    Type: Article
    In: Proceedings of the Biological Society of Washington
    Volume: 65
    Date: 1952
    Page Range: 35--38
    Publication Info: Washington, Biological Society of Washington,
  5. By: Harper, F
    Type: Article
    In: Proceedings of the Biological Society of Washington
    Volume: 52
    Date: 1939
    Page Range: 89--91
    Publication Info: Washington, Biological Society of Washington,
  6. By: Harper, F
    Type: Article
    In: Proceedings of the Biological Society of Washington
    Volume: 59
    Date: 1946
    Page Range: 29--30
    Publication Info: Washington, Biological Society of Washington,
  7. By: Harper, F
    Type: Article
    In: Proceedings of the Biological Society of Washington
    Volume: 60
    Date: 1947
    Page Range: 39--40
    Publication Info: Washington, Biological Society of Washington,
  8. By: Harper, F
    Type: Article
    In: Proceedings of the Biological Society of Washington
    Volume: 32
    Date: 1919
    Page Range: 243--244
    Publication Info: Washington, Biological Society of Washington,
  9. By: Harper, F
    Type: Article
    In: Proceedings of the Biological Society of Washington
    Volume: 45
    Date: 1932
    Page Range: 15--17
    Publication Info: Washington, Biological Society of Washington,