Columbia subject headings:
Drug abuse--Patients--Washington Metropolitan Area--Statistics.
Drug abuse--Treatment--Washington Metropolitan Area--Statistics.
Drug addicts--Washington Metropolitan Area--Statistics.
Harvard subject headings:
Drug abuse--Treatment--Washington Metropolitan Area--Statistics.
Drug addicts--Washington Metropolitan Area--Statistics.
Inmates of institutions--Drug use--Washington Metropolitan Area--Statistics.
Princeton subject headings:
Drug abuse--Treatment--Washington Metropolitan Area--Statistics.
Drug addicts--Washington Metropolitan Area--Statistics.
Inmates of institutions--Drug use--Washington Metropolitan Area--Statistics.
Statistics.