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Journal Article THE FOCUSSED INTERVIEW AND FOCUS GROUPS CONTINUITIES AND DISCONTINUITIES Get access ROBERT K. MERTON ROBERT K. MERTON University Professor Emeritus at Columbia University Search for other works by this author on: Oxford Academic Google Scholar Public Opinion Quarterly, Volume 51, Issue 4, WINTER 1987, Pages 550–566, https://doi.org/10.1086/269057 Published: 01 January 1987
Robert Κ. Merton (Thu,) studied this question.