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    Journal
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    Published 1996
    Journal
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    Journal
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    Published 1936
    Journal
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    Conference Proceeding Journal
  11. 11
    Published 1933
    Journal
  12. 12
    Published 1980
    Journal
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    Published 1973
    Journal
  14. 14
    Published 1996
    Journal
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    Published 1997
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  16. 16
    Full text online
    Journal
  17. 17
    Published 2005
    Journal
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    Government Document Journal
  19. 19
    Published 2004
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    Government Document Journal
  20. 20
    Published 2002
    Journal
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