- Author: Wilhelm Krusch
- Language: German
- Year: 1993
- Author: Hans Hajer, Rainer Kolbeck
- Language: German
- Year: 1995
- Author: Eberhard Witte (Hrsg.)
- Language: German
- Year: 1990
- Author: Hans Stekle (Hrsg.)
- Language: German
- Year: 1985
- Author: Paul Klimsa Michael Maruschke
- Language: German
- Year: 1996
- Author: Michael Gerding Bernd Kretschmer
- Language: German
- Year: 1996
- Author: Heinz Geelhaar
- Language: German
- Year: 1994
- Author: Bernd Seiler (Hrsg.)
- Language: German
- Year: 2001
- Author: Walter Tietz (Übersetzer) ITU CCITT
- Language: German
- Year: 1985