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- Language: English
- Year: 1971
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- Author: V. G. Romanov
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- Year: 1974
- Author: Elna Browning McBride (auth.)
- Language: English
- Year: 1971
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- Language: German
- Year: 1964
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- Language: German
- Year: 1964
- Author: Professor Dr.-Ing. Herbert Buchholz (auth.)
- Language: English
- Year: 1969
