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  1. 1
    by Conrad, Marion L.
    Published 1955
    Book
  2. 2
    Published 1981
    Book
  3. 3
  4. 4
    Published 1970
    Journal
  5. 5
    Published 1981
    Book
  6. 6
    Published 1981
    Book
  7. 7
    Published 1979
    Serial
  8. 8
    by Crook, William G.
    Published 1978
    Book
  9. 9
    by Burns, Sheila L.
    Published 1980
    Book
  10. 10
    Published 1980
    Book
  11. 11
    Book
  12. 12
  13. 13
    by Speer, Frederic
    Published 1982
    Book
  14. 14
    Published 1973
    Conference Proceeding Book
  15. 15
  16. 16
  17. 17
    Book
  18. 18
  19. 19
    by Stanworth, D. R.
    Published 1973
    Book
  20. 20
    Published 1937
    Journal
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