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Proceedings of the Thirteenth Conference on Public Opinion Research JOHN W. RILEY, JR., JOHN W. RILEY, JR. Editor Search for other works by this author on: Oxford Academic Google Scholar FREDERICK F. STEPHAN FREDERICK F. STEPHAN President AAPOR Search for other works by this author on: Oxford Academic Google Scholar Public Opinion Quarterly, Volume 22, Issue 2, SUMMER 1958, Page 169, https://doi.org/10.1086/266784 Published: 01 January 1958
John W. Riley (Wed,) studied this question.