• 

  Seismographen

  http://wayback.archive.org/web/20130525063648/http://www.geophys.uni-stuttgart.de/oldwww/seismometry/seismo_htm/seismographen.ht

  Keine Beschreibung vorhanden.

• 

  Seismographen

  https://web.archive.org/web/20110318044124/http://www.geophys.uni-stuttgart.de/oldwww/seismometry/seismo_htm/seismographen.htm

  Keine Beschreibung vorhanden.

• 

  Warum musste die "Pamir" untergehen?

  https://web.archive.org/web/20090820055053/http://www.gerdgruendler.de/Pamir-Untergang.html

  Keine Beschreibung vorhanden.

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