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Journal Article A TEST OF THE USEFULNESS OF THE POST-CARD TECHNIQUE IN A MAIL QUESTIONNAIRE STUDY Get access WALTER E. BOEK, WALTER E. BOEK Walter E. Boek is Consultant, Bureau of Social Science Research, Inc.Washington, D.C. Search for other works by this author on: Oxford Academic Google Scholar JAMES H. LADE JAMES H. LADE James H. Lade is Director Office of Medical Defense, New York State Department of Health and New York State Civil Defense CommissionWashington, D.C. Search for other works by this author on: Oxford Academic Google Scholar Public Opinion Quarterly, Volume 27, Issue 2, SUMMER 1963, Pages 303–306, https://doi.org/10.1086/267173 Published: 01 January 1963
Boek et al. (1963) studied this question.