title: Surveying and tracking urban elementary school children's use of abusable substances.
authors.affiliation: Department of Community and Family Medicine, Georgetown University School of Medicine, Washington, DC 20007.
authors.forename: P J
authors.initials: PJ
authors.lastname: Bush
authors.forename: M A
authors.initials: MA
authors.lastname: D'Elio
authors.forename: C D
authors.initials: CD
authors.lastname: Peoples
authors.forename: H M
authors.initials: HM
authors.lastname: Schell
mesh_terms: D000293:Adolescent; D002648:Child; D003625:Data Collection / Q000379:methods; D004219:District of Columbia; D005006:Ethnicity / Q000523:psychology*; D006801:Humans; D007406:Interview, Psychological; D019966:Substance-Related Disorders / Q000453:epidemiology* / Q000208:ethnology / Q000523:psychology; D014505:Urban Population