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- Language: English
- Year: 2010
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- Year: 2017
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- Language: German
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- Language: English
- Year: 2016
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- Language: English
- Year: 2000
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- Year: 2014
- Author: J. H. Powell
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- Year: 1993
- Author: Laszlo Tabar
- Language: English
- Year: 2007