?:citationString
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European Commission, Brussels (2018): Eurobarometer 81.4 (2014). GESIS Data Archive, Cologne. ZA5928 Data file Version 3.0.0, doi:10.4232/1.12956
(en)
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European Commission, Brussels (2018): Eurobarometer 81.4 (2014). GESIS Datenarchiv, Köln. ZA5928 Datenfile Version 3.0.0, doi:10.4232/1.12956
(de)
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