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Journal Article 4. "Panel" Studies Get access PAUL F. LAZARSFELD PAUL F. LAZARSFELD Director Princeton Office of Radio Research Search for other works by this author on: Oxford Academic Google Scholar Public Opinion Quarterly, Volume 4, Issue 1, March 1940, Pages 122–128, https://doi.org/10.1086/265373 Published: 01 March 1940
Paúl F. Lazarsfeld (Fri,) studied this question.