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  -IGB·TUBS-

  https://web.archive.org/web/20070703064934/http://www.igb.tu-bs.de/allgem/history/history.htm

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  -IGB·TUBS -

  http://wayback.archive.org/web/20070727111902/http://www.igb.tu-bs.de/allgem/biblio/hefte/heft53.htm

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