- Author: Karl Marx Friedrich Engels
- Language: German
- Year: 2001
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- Language: German
- Year: 1979
- Author: Karl Marx Friedrich Engels
- Language: German
- Year: 2002
- Author: Karl Marx Friedrich Engels
- Language: German
- Year: 2003
- Author: Paul Ritter, Willy Kabitz, Erich Hochstetter
- Language: German
- Year: 1970
- Author: Heinz-Jürgen Heß
- Language: German
- Year: 1987