RT Book T1 Family development in three generations: a longitudinal study of changing family patterns of planning and achievement A1 Hill, Reuben 1912-1985 LA English PP Cambridge, Mass. u.a. PB Schenkman YR 1970 UL https://krimdok.uni-tuebingen.de/Record/1072734125 CN 301.42/1/0973 K1 Familiensoziologie