Columbia subject headings:
African Americans--Alcohol use--Congresses.
African Americans--Drug use--Congresses.
Alcoholism--United States--Prevention--Congresses.
Drug abuse--United States--Prevention--Congresses.
Harvard subject headings:
African Americans--Alcohol use--Congresses
African Americans--Drug use--Congresses.
Alcoholism--United States--Prevention--Congresses.
Drug abuse--United States--Prevention--Congresses.
Princeton subject headings: