7US Department of Health and Human Services. Preventing tobacco use among young people: A report of the surgeon general. Atlanta: U.S. Department of Health and Human Services, Centers for Disease Con- trol and Prevention, Office on Smoking and Health, 1994.
9SUSAN TE, ROBERT LF. School and neighborhood characteristics associated with School rates of alcohol, cigarette, and marijuana use. J Health Soc Behav, 1997,38 ( 1 ) : 155 - 171.
