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  1. 1
    Published 2001
    Continuing Resource
  2. 2
    Published 1995
    Continuing Resource
  3. 3
    Published 1991
    Continuing Resource
  4. 4
    Published 1987
    Continuing Resource
  5. 5
    Published 1986
    Continuing Resource
  6. 6
    Published 1985
    Continuing Resource
  7. 7
    Published 1984
    Continuing Resource
  8. 8
    Published 1983
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    Continuing Resource
  9. 9
    Published 1980
    Continuing Resource
  10. 10
    Published 1970
    Continuing Resource