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- Author: Holmes Catherine V
- Language: English
- Year: 2015
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- Author: Sonnberger Thomas
- Language: German
- Year: 2016
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- Author: Keck Gecko
- Language: German
- Year: 2016
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- Author: Flemming Kai
- Language: German
- Year: 2013
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- Author: Albert Greg
- Language: English
- Year: 1994
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- Author: Gansterer Nikolaus
- Language: English
- Year: 2011
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- Author: Bardel William, Baskinger Mark
- Language: English
- Year: 2013