00699nam 2200157z- 450 9910712501803321(CKB)5470000002495139(EXLCZ)99547000000249513920230509c1972uuuu -u- -engHearing levels of children by demographic and socioeconomic characteristics, United StatesU.S. Department of Health, Education, and Welfare, Public Health Service, Health Services and Mental Health Administration, National Center for Health StatisticsRockville, MdBOOK9910712501803321Hearing levels of children by demographic and socioeconomic characteristics, United States3343586UNINA