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Aktuell

1984-2004

Aktuelles Lexikon

1974-2007

Bertelsmann - Kompakt-Lexikon ...

2005-2008

Bertelsmann discovery

1995-1998

Bertelsmann InfoLINE ...

2001-2002

Bertelsmann infoROM

1997-1998

Bertelsmann-Lexikothek plus

1994-2004

Bertelsmann-Universallexikon

2005-2007

Bibliografie

Bol'šaja sovetskaja ėnciklopedija

1957-1990