1
Published: Berlin : Directmedia Publ, 2004.
CD-ROM
2
Published: Gütersloh ; München : Bertelsmann, 1993.
CD-ROM
3
Published: Bonn : BpB, 2003.
CD-ROM
4
Published: Potsdam : Zentrum für Zeithistorische Forschung, 1999.
CD-ROM