socioeconomic factors, United States MacMahon, Brian creator author. Kovar, Mary Grace author. Feldman, Jacob J. author. National Center for Health Statistics (U.S.) issuing body. text bibliography Statistics. Vital statistics. Vital statistics. mdu 1972 monographic eng 1 online resource (iii, 68 pages) : illustrations. Brian MacMahon, Mary Grace Kovar, and Jacob J. Feldman. "Statistics on infant mortality rates according to race, sex, family income, education of mother, and education of father. Based on data collected by a questionnaire mailed to mothers of legitimate births and to medical care facilities and mothers of legitimate infant deaths. Samples selected from records of births and infant deaths in 1964, 1965, and 1966 which were filed with the National Center for Health Statistics." "March 1972." CRDP Program record. Includes bibliographical references (page 9). n-us--- Infants Mortality United States Statistics Parents United States Economic conditions Statistics Parents United States Social conditions Statistics United States Statistics, Vital Infants Mortality United States HE 20.2210:22/14 HE 20.6209:22/14 HE 20.2210:22/14 HE 20.6209:22/14 MacMahon, Brian, 1923-2007. (DLC) 74169290 (OCoLC)416358 Series 22 Data from the national vital statistics system 74169290 https://purl.fdlp.gov/GPO/gpo114528 https://purl.fdlp.gov/GPO/gpo114528 SXT 110601 20190831131641.0 on1015646632 eng