International Social Survey Programme: Environment IV - ISSP 2020
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The International Social Survey Programme (ISSP) is a continuous programme of cross-national collaboration running annual surveys on topics important for the social sciences....
国际社会调查项目（International Social Survey Programme，ISSP）是一项持续性跨国合作计划，围绕社会科学领域的重要议题开展年度调查……
