Showing 1 - 6 results of 6 for search '(((ruhr OR ruhe) OR nuhr) OR (mohr OR lahr))', query time: 0.04s Refine Results
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    Book Chapter
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    by Thomson, Erik
    Published 1958
    Book
  4. 4
    by Siegert, Richard
    Published 1986
    Book
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  6. 6