Columbia subject headings:
Alcoholism and employment--United States--Statistics.
Alcoholism--United States--Statistics.
Drug abuse--United States--Statistics.
Drugs and employment--United States--Statistics.
Harvard subject headings:
Alcoholism and employment--United States--Statistics.
Alcoholism--United States--Statistics.
Drug abuse--United States--Statistics
Drugs and employment--United States--Statistics.
Princeton subject headings:
Alcoholism and employment--United States--Statistics.
Alcoholism--United States--Statistics.
Drug abuse--United States--Statistics.
Drugs and employment--United States--Statistics.
Statistics.