00630nam 2200157z- 450 9910712434303321(CKB)5470000002493801(EXLCZ)99547000000249380120230509c1974uuuu -u- -engBehavior patterns in school of youths 12-17 years, United StatesU.S. Department of Health, Education, and Welfare, Public Health Service, Health Resources Administration, National Center for Health StatisticsRockville, MdBOOK9910712434303321Behavior patterns in school of youths 12-17 years, United States3263494UNINA