Columbia subject headings:
Smoking--United States--Prevention.
Smoking--United States--Statistics.
Teenagers--Tobacco use--United States--Prevention.
Teenagers--Tobacco use--United States--Statistics.
Harvard subject headings:
Smoking--United States--Prevention
Smoking--United States--Statistics.
Teenagers--Tobacco use--United States--Prevention.
Teenagers--Tobacco use--United States--Statistics.
Princeton subject headings:
Smoking--United States--Prevention.
Smoking--United States--Statistics.
Statistics.
Teenagers--Tobacco use--United States--Prevention.
Teenagers--Tobacco use--United States--Statistics.