Columbia subject headings:
Alcoholism--Research--Congresses.
Drug abuse--Research--Congresses.
Substance abuse--Congresses.
Harvard subject headings:
Alcoholism--Research--Congresses.
Drug abuse--Research--Congresses.
Substance abuse--Congresses
Princeton subject headings:
Alcoholism--Research--Congresses.
Drug abuse--Research--Congresses.
Substance abuse--Congresses.