Politbarometer 2019 (Cumulated Data Set)
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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)....
政治晴雨表（Politbarometer）自1977年起，由选举研究小组（Research Group for Elections，Forschungsgruppe Wahlen）为德国第二电视台（ZDF）以近乎月度的频率持续开展调研工作……
