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1Saur 2001Book
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2De Gruyter [2014], cop. 2015Book
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3W. De Gruyter cop. 2012 [i.e. 2011]Book
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4W. De Gruyter cop. 2013Book
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5De Gruyter impr. 2013, cop. 2014Book
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6De Gruyter cop. 2010Book