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    Published 1977
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    Manuscript
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  9. 9
    Published 1975
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  10. 10
    Published 1975
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    Manuscript
  11. 11
    Published 1988
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    Manuscript
  12. 12
    Published 1999
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    Manuscript
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    Published 1975
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  16. 16
    Published 1971
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    Published 1987
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  19. 19
    Published
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  20. 20
    Published 1970
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    Manuscript
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