Columbia subject headings:
Drug abuse surveys--New York (State)--New York.
Drug abuse--New York (State)--New York.
Heroin.
Young men--Drug use--New York (State)--New York.
Harvard subject headings:
Drug abuse surveys--New York (State)--New York.
Drug abuse--New York (State)--New York.
Heroin.
New York (State)
Young men--Drug use--New York (State)--New York.
Young men--New York (State)--New York--Drug use.
Princeton subject headings:
Drug abuse surveys--New York (State)--New York.
Drug abuse--New York (State)--New York.
Heroin.
Young men--Drug use--New York (State)--New York.