?:citationString
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European Commission, Brussels (2017): Flash Eurobarometer 451 (Business Perceptions of Regulation). GESIS Data Archive, Cologne. ZA6857 Data file Version 1.0.0, doi:10.4232/1.12912
(en)
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European Commission, Brussels (2017): Flash Eurobarometer 451 (Business Perceptions of Regulation). GESIS Datenarchiv, Köln. ZA6857 Datenfile Version 1.0.0, doi:10.4232/1.12912
(de)
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