Politbarometer 2020 (Cumulated Data Set)
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https://b2find.eudat.eu/dataset/d29d6416-39b8-5488-b6ec-a3eaefa7e4d9
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资源简介：
The Politbarometer has been conducted since 1977 on an almost monthly basis by the Research Group for Elections (Forschungsgruppe Wahlen) for the Second German Television (ZDF)....
