Columbia subject headings:
Drug control--United States.
Drug traffic--United States.
Drugs of abuse--United States.
United States. Drug Enforcement Administration.
Harvard subject headings:
Drug control--United States
Drug traffic--Investigation--United States
Drug traffic--United States
Drugs of abuse--United States.
United States. Drug Enforcement Administration
Princeton subject headings:
Drug control--United States.
Drug traffic--Investigation--United States.
Drugs of abuse--United States.
United States. Drug Enforcement Administration