00562nam 2200157z- 450 9910712672303321(CKB)5470000002495437(EXLCZ)99547000000249543720230509c1970uuuu -u- -engVisual acuity of children, United StatesWashington, D.CU.S. Department of Health, Education, and Welfare, Public Health Service, Health Services and Mental Health AdministrationBOOK9910712672303321Visual acuity of children, United States3304711UNINA