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  1. By: Williamson, William C - Boomker, J.
    Type: Article
    In: Journal of the Lepidopterists' Society
    Volume: 34
    Date: 1981
    Page Range: 295--301
    Publication Info: [New Haven, Conn.] Lepidopterists' Society 1959-
  2. By: Williamson, William C
    Type: Article
    In: The Annals and magazine of natural history; zoology, botany, and geology
    Volume: 17
    Date: 1846
    Page Range: 467--468
    Publication Info: London Taylor and Francis, Ltd
  3. By: Williamson, William C
    Type: Correspondence
    In: Asa Gray correspondence
    Date: 1881-12-04
    Publication Info: [1833-1900]
  4. By: Williamson, William C
    Type: Correspondence
    In: Asa Gray correspondence
    Date: 1882-07-17
    Publication Info: [1833-1900]
  5. By: Williamson, William C
    Type: Correspondence
    In: Asa Gray correspondence
    Date: 1882-10-11
    Publication Info: [1833-1900]
  6. By: Williamson, William C
    Type: Correspondence
    In: Asa Gray correspondence
    Date: 1886-10-02
    Publication Info: [1833-1900]
  7. By: Williamson, William C
    Type: Correspondence
    In: Asa Gray correspondence
    Date: 1887-10-28
    Publication Info: [1833-1900]