Columbia subject headings:
Drug abuse surveys--Washington Metropolitan Area.
Drug abuse--Washington Metropolitan Area--Prevention.
Drug abuse--Washington Metropolitan Area--Statistics.
Harvard subject headings:
Drug abuse--Washington Metropolitan Area--Prevention--Public opinion.
Drug abuse--Washington Metropolitan Area--Public opinion.
Public opinion--Washington Metropolitan Area.
Princeton subject headings:
Drug abuse--Washington Metropolitan Area--Prevention--Public opinion.
Drug abuse--Washington Metropolitan Area--Public opinion.
Public opinion--Washington Metropolitan Area.