Columbia subject headings:
Drug abuse and crime--Mexico.
Drug control--Mexico.
Drug dealers--Mexico.
Drug traffic--Political aspects--Mexico.
Violence--Mexico.
Harvard subject headings:
Drug abuse and crime--Mexico.
Drug control--Mexico
Drug dealers--Mexico.
Drug traffic--Political aspects--Mexico.
Princeton subject headings:
Drug abuse and crime--Mexico.
Drug control--Mexico.
Drug dealers--Mexico.
Drug traffic--Political aspects--Mexico.