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  1. 1
    published 1985
    Book
  2. 2
    published 1996
    Book
  3. 3
    published 1996
    Book
  4. 4
  5. 5
  6. 6
    published 1997
    Book Conference Proceedings
  7. 7
    published 1997
    Book Conference Proceedings
  8. 8
    by Rathgen, Friedrich
    published 1898
    Book
  9. 9
    by Schulze, Paul
    published 1920
    Book
  10. 10
  11. 11
  12. 12
  13. 13
    by Graul, Richard
    published 1905
    Book
  14. 14
  15. 15
  16. 16
  17. 17
    published 1998
    Book
  18. 18
  19. 19
  20. 20