Title: Trends and variations in first births to older women, 1970-86
First published: 1989
Subjects: Statistics, Childbirth in middle age, Maternal age, Birth intervals, First-born children, Industrial hygiene, Occupations, Health Surveys, Public health, Medical Statistics
Places: United States
LC classification: HA211 .A3 no. 47, HB915 .A3 no. 47