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- Author: George Grätzer (auth.)
- Language: English
- Year: 1978
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- Language: German
- Year: 1983
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- Author: Prof. Robert Hegnauer Minie Hegnauer (auth.)
- Language: German
- Year: 2001
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- Author: Prof. R. Hegnauer (auth.)
- Language: German
- Year: 1994
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- Author: Gustav Doetsch (auth.)
- Language: German
- Year: 1950
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- Language: German
- Year: 1955
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- Language: German
- Year: 1950
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- Author: Paul Buchner (auth.)
- Language: German
- Year: 1953