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  1. 41
    by McDougall, Walter A., 1946-
    Published 2008
    Book
  2. 42
  3. 43
    by Hummel, Jeffrey Rogers
    Published 1996
    Book
  4. 44
    by Kastor, Peter J.
    Published 2004
    Book
  5. 45
    Book
  6. 46
  7. 47