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  1. 1
    Published 2009
    Book
  2. 2
    by Tietenberg, Thomas H.
    Published 2000
    Book
  3. 3
    by Low, Linda
    Published 2000
    Book
  4. 4
    Published 1997
    Book
  5. 5
    by Harrigan, Jane
    Published 1992
    Book
  6. 6