Fertility data obtained in Wolbrom, Poland were utilized for the analysis of family models. During the period of 1877-1950 the average number of births per married couple decreased gradually from 7.71 to 3.00. Between 1881 and 1980 about 50% of all births occurred in families of 7-10 children. The analysis of the periods of 1877-1910 and 1941-1950 showed… (More)
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