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  1. 1
    Published 2018
  2. 2
    Published 2011
  3. 3
  4. 4
    Published 1980
  5. 5
  6. 6
  7. 7
    Published 1990
  8. 8
  9. 9
    Published 2020
  10. 10
    by Cramer, Gail L.
    Published 1991
  11. 11
    Published 1998
  12. 12
  13. 13
    Published 2010
  14. 14
    Published 1990
  15. 15
  16. 16
    Published 1990
  17. 17
    Published 2001
  18. 18
  19. 19
  20. 20
    by Downey, W. David.
    Published 1987
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