TY - JOUR AU - TI - Scientific Social Surveys and Research. JF - Journal of the American Statistical Association DO - 10.2307/2279821 DA - 1939-12-01 UR - https://www.deepdyve.com/lp/crossref/scientific-social-surveys-and-research-B6a7jDURO5 SP - 752 VL - 34 IS - 208 DP - DeepDyve ER -