• 

  Frensch

  http://web.archive.org/web/20010512215741/http://www.thomas-koerbel.de/frensch.html

  Keine Beschreibung vorhanden.

• 

  Dr. Thomas Körbel - Exkurs: Michael Frensch, Tabula Smaragdina

  http://wayback.archive.org/web/20081028224910/http://www.thomas-koerbel.de/frensch.html

  Keine Beschreibung vorhanden.

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