00768nam 2200181z- 450 9910689393003321(CKB)5470000002331557(EXLCZ)99547000000233155720230503c1978uuuu -u- -engNational survey of family growth, cycle I : sample design, estimation procedures, and variance estimationHyattsville, MdU.S. Dept. of Health, Education, and Welfare, Public Health Service, National Center for Health Statistics ;0-8406-0116-6 National survey of family growth, cycle I BOOK9910689393003321National survey of family growth, cycle I : sample design, estimation procedures, and variance estimation3144482UNINA