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Journal Article MAXIMIZING RESPONSES TO MAIL QUESTIONNAIRES: A NEW TECHNIQUE Get access JOHN B. KNOX JOHN B. KNOX University of Tennessee Search for other works by this author on: Oxford Academic Google Scholar Public Opinion Quarterly, Volume 15, Issue 2, SUMMER 1951, Pages 366–367, https://doi.org/10.1086/266318 Published: 01 January 1951
John B. Knox (Mon,) studied this question.