- Author: Erik von Groeling
- Language: German
- Year: 1971
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- Language: English
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- Language: English
- Year: 2023
- Author: Michael W. Doyle
- Language: English
- Year: 2023
- Author: Jonathan D.T. Ward
- Language: English
- Year: 2023
- Author: GRIFFIN Des
- Language: English
- Year: 1979
- Author: Steven Simon
- Language: English
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- Author: Østerud Øyvind
- Language: Norwegian
- Year: 1986
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- Language: German
- Year: 1986