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  1. 1
    by Downs, David Earl
    Published 1977
    Link to OAKTrust copy
    Thesis eBook
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  11. 11
    Published 1988
    Get full text
    Government Document Journal
  12. 12
    Published 1998
    Adobe Acrobat reader required
    Government Document Book
  13. 13
    by Tillman, Peggie S.
    Published 1996
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    Government Document Conference Proceeding Book
  14. 14
    Published 1998
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    Government Document Book
  15. 15
  16. 16
    Journal
  17. 17
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