1
Published: Rheinbreitbach : NDV, 2003-[2017]
CD-ROM
2
Published: [Bonn] : Europa-Union-Verl, [ca. 1997]
CD-ROM
3
Published: Berlin : Directmedia Publ, 2000
CD-ROM
4
Published: Berlin : Forschungsverbund SED-Staat, 2005
CD-ROM
5
Published: Bonn : BpB, 2003
CD-ROM
6
Published: Gütersloh ; München : Bertelsmann, 1993.
CD-ROM
7
Published: Bonn : BpB, 2003.
CD-ROM
8
Published: München : Saur, 2001.
CD-ROM
9
Published: Unterschleißheim : Microsoft [u.a.], 1995.
CD-ROM