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  1. 1
    Published 2007
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  2. 2
    Published 1997
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  3. 3
    Published 1990
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  4. 4
    Published 1982
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  5. 5
    Published 1979
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  6. 6
    Published 1971
    Continuing Resource
  7. 7
    Published 1960
    Continuing Resource
  8. 8
    Continuing Resource
  9. 9
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  10. 10
    Continuing Resource