1. 1
    by Ward, Allen Mason, 1942-
    Published 1977
    Book
  2. 2
    by Leach, John, 1938-
    Published 1986
    Book
  3. 3
  4. 4
  5. 5
    Book
  6. 6
  7. 7
    by Rilinger, Rolf
    Published 1976
    Book
  8. 8
    by Humm, Michel
    Published 2005
    Thesis Book