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European Commission, Brussels (2024): Flash Eurobarometer 542 (Businesses´ Attitudes Towards the Schengen Area). GESIS Data Archive, Cologne. ZA8818 Data file Version 1.0.0, doi:10.4232/1.14407
(en)
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European Commission, Brussels (2024): Flash Eurobarometer 542 (Businesses´ Attitudes Towards the Schengen Area). GESIS Datenarchiv, Köln. ZA8818 Datenfile Version 1.0.0, doi:10.4232/1.14407
(de)
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