Columbia subject headings:
Drug abuse and crime--United States.
Drug control--Latin America.
Drug control--Mexico.
Drug control--United States.
Drug traffic--Latin America.
Drug traffic--Mexico.
Harvard subject headings:
Drug abuse and crime--United States
Drug control--Latin America
Drug control--Mexico
Drug control--United States
Drug traffic--Latin America
Drug traffic--Mexico
Princeton subject headings:
Drug abuse and crime--United States.
Drug control--Latin America.
Drug control--Mexico.
Drug control--United States.
Drug traffic--Latin America.
Drug traffic--Mexico.