• 

  Gefängnisse und Haftstätten

  http://www.historisches-centrum.de/zwangsarbeit/haft.htm

  This website provided a catalogue with lists of civil worker camps, prisons and states institutions during the Third Reich and World War II in Hagen

• 

  Gefängnisse und Haftstätten

  https://web.archive.org/web/20110728161438/http://www1.historisches-centrum.de/zwangsarbeit/haft.htm

  This website provided a catalogue with lists of civil worker camps, prisons and states institutions during the Third Reich and World War II in Hagen

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