Trends and variations in first births to older women, 1970-86.
出版资料
Hyattsville, Md. : U.S. Dept. of Health and Human Services, Public Health Service, Centers for Disease Control, National Center for Health Statistics, [1989]
复本
载体形态
iv, 27 p. : ill. ; 28 cm.
丛编
Vital and health statistics. Series 21, Data from the National Vital Statistics System ; no. 47
