RT Book T1 Socioeconomic background and achievement T2 Studies in population A1 Duncan, Otis Dudley 1921-2004 A2 Featherman, David L. A2 Duncan, Beverly LA English PP New York u.a. PB Seminar Press YR 1973 ED 2. print. UL https://krimdok.uni-tuebingen.de/Record/1074054202