National Opinion Polls National Political Surveys; May 1968
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Abstract copyright UK Data Service and data collection copyright owner. The NOP National Political Surveys were designed principally to ascertain public opinion on political...
本摘要的版权归英国数据服务中心（UK Data Service）及本次数据采集的版权所有者所有。NOP全国政治调研项目（NOP National Political Surveys）最初主要旨在探明公众在政治议题上的舆论……
