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    by Kern, Gertrud
    published 1987
    Book Thesis
  4. 4
    by Dempsey, Hugh A
    published 1965
    Book
  5. 5
    by Ibarra Grasso, Dick Edgar
    published 1953
    Book
  6. 6
    by Volkmann, Ludwig
    published 1923
    Book
  7. 7