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  1. 1
  2. 2
    by Cross, Ralph D.
    Published 1976
    Book
  3. 3
    Published 1978
    Government Document Book
  4. 4
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    Government Document Serial
  5. 5
    Current issue
    Archived issues
    Government Document Electronic Serial
  6. 6
    by Parker, Douglas W.
    Published 1981
    Government Document Book
  7. 7
    Published 1970
    Book
  8. 8
    by Smith, Clark L.
    Published 1972
    Government Document Book
  9. 9
  10. 10
  11. 11
  12. 12
    Published 2006
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    Government Document Book
  13. 13
  14. 14
    Published 1971
    Book
  15. 15
  16. 16
    Published 2009
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    Government Document eBook
  17. 17
    Published 2009
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    Government Document eBook
  18. 18
  19. 19
  20. 20
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