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  1. By: Thomas, Barry A. - Purdy, H M
    Type: Article
    In: Bulletin of the British Museum (Natural History) Geology
    Volume: 36
    Issue: 2
    Date: 1981-10-28
    Page Range: 131--142
    Publication Info: London, BM(NH),
  2. By: Thomas, Barry A.
    Type: Article
    In: Palaeontology
    Volume: 13
    Date: 1970
    Page Range: 145--173
    Publication Info: London, Palaeontological Association, 1957-
  3. By: Thomas, Barry A.
    Type: Article
    In: Palaeontology
    Volume: 20
    Date: 1977
    Page Range: 273--293
    Publication Info: London, Palaeontological Association, 1957-
  4. By: Thomas, Barry A.
    Type: Article
    In: Palaeontology
    Volume: 17
    Date: 1974
    Page Range: 525--539
    Publication Info: London, Palaeontological Association, 1957-
  5. By: Thomas, Barry A. - Spicer, Robert A
    Type: Article
    In: Bulletin of the British Museum (Natural History) Geology
    Volume: 40
    Issue: 5
    Date: 1986-12-18
    Page Range: 293--297
    Publication Info: London, BM(NH),
  6. By: Thomas, Barry A.
    Type: Article
    In: Palaeontology
    Volume: 12
    Date: 1969
    Page Range: 253--261
    Publication Info: London, Palaeontological Association, 1957-
  7. By: Gao, Zhifeng - Thomas, Barry A.
    Type: Article
    In: Palaeontology
    Volume: 36
    Date: 1993
    Page Range: 81--89
    Publication Info: London, Palaeontological Association, 1957-
  8. By: Thomas, Barry A.
    Type: Article
    In: Annals of the Missouri Botanical Garden
    Volume: 79
    Date: 1992
    Page Range: 623--631
    Publication Info: St. Louis, Missouri Botanical Garden Press, 1914-
  9. By: Smith, Alan R., - Jermy, A C - Crabbe, J A - Thomas, Barry A.
    Type: Article
    In: American fern journal
    Volume: 64
    Date: 1974
    Page Range: 117--118
    Publication Info: [Washington, etc.] American Fern Society
  10. By: Gao, Zhifeng - Thomas, Barry A.
    Type: Article
    In: Palaeontology
    Volume: 30
    Date: 1987
    Page Range: 815--828
    Publication Info: London, Palaeontological Association, 1957-
  11. By: Thomas, Barry A. - Meyen, S V
    Type: Article
    In: Palaeontology
    Volume: 27
    Date: 1984
    Page Range: 707--718
    Publication Info: London, Palaeontological Association, 1957-
  12. By: Thomas, Barry A.
    Type: Article
    In: Palaeontology
    Volume: 11
    Date: 1968
    Page Range: 439--444
    Publication Info: London, Palaeontological Association, 1957-
  13. By: Thomas, Barry A.
    Type: Article
    In: American fern journal
    Volume: 89
    Date: 1999
    Page Range: 101--105
    Publication Info: [Washington, etc.] American Fern Society