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30 May 2012

  • curprev 19:0519:05, 30 May 2012Bill Peterson talk contribs 215 bytes +215 from "Assessing the Representativeness of Public Opinion Surveys", Pew Research Center, 15 May 2012 http://www.people-press.org/2012/05/15/assessing-the-representativeness-of-public-opinion-surveys/?src=prc-headline