• 

  Widerstandsortung

  http://wayback.archive.org/web/20120802132803/http://www.brandes.de/widerstandsortung.html

  Begriff: Widerstandsortung. Brandes-Glossar

• 

  Nordisches System

  http://wayback.archive.org/web/20120803011937/http://www.brandes.de/nordisches-system.html

  Begriff: Nordisches System. Brandes-Glossar

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