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  1. 1
    by Lenk, John D.
    Published 1999
    Book
  2. 2
    by Lenk, John D.
    Published 1995
    Book
  3. 3
    by Lenk, John D.
    Published 1987
    Book
  4. 4
    by Lenk, John D.
    Published 1979
    Book