TU Clausthal 2015

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TU Clausthal 2013

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TU Clausthal 2012

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TU Clausthal 2011

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TU Clausthal 2010

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Petrofer Chemie Hildesheim 2010

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Gedenkstätte Ahlem 2013

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BBS Alfeld 2014

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BBS Alfeld 2011

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BBS Alfeld 2010

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