Columbia subject headings:
Harvard subject headings:
Drug abuse--Congresses
Drug abuse--Periodicals
Drug abuse--Treatment--Congresses
Drug addiction--Congresses
Neuropsychopharmacology--Periodicals.
Princeton subject headings:
Drug abuse--Congresses.
Drug abuse--Treatment--Congresses.
Drug addiction--Congresses.
Neuropsychopharmacology--Congresses.