RT Article T1 Utility of health data from social surveys: is there a gold standard for measuring morbidity? JF American sociological review VO 64 IS 2 SP 303 OP 315 A1 Ferraro, Kenneth F. A1 Farmer, Melissa M. A2 Farmer, Melissa M. LA English YR 1999 UL https://krimdok.uni-tuebingen.de/Record/163975511X K1 Gesundheit K1 Morbidität K1 Erfassungsprobleme