- Author: Hermann Weyl Komaravolu Chandrasekharan (editor)
- Language: English, German
- Year: 1968
- Author: Hermann Weyl Komaravolu Chandrasekharan (editor)
- Language: German, English, Spanish
- Year: 1968
- Author: Hermann Weyl Komaravolu Chandrasekharan (editor)
- Language: German, English, French
- Year: 1968
- Author: Hermann Weyl Komaravolu Chandrasekharan (editor)
- Language: German, English
- Year: 1968