Columbia subject headings:
Heroin abuse--California--San Diego--Statistics.
Heroin abuse--Illinois--Chicago--Statistics.
Heroin abuse--New York (State)--New York--Statistics.
Harvard subject headings:
Heroin abuse--California--San Diego--Statistics.
Heroin abuse--Illinois--Chicago--Statistics.
Heroin abuse--New York (State)--New York--Statistics.
Princeton subject headings:
Heroin abuse--California--San Diego--Statistics.
Heroin abuse--Illinois--Chicago--Statistics.
Heroin abuse--New York (State)--New York--Statistics.
Statistics.