Columbia subject headings:
Caravana por la Paz.
Crime victims' families--Mexico.
Drug control--United States.
Drug traffic--Mexico.
Peace movements--United States.
Protest movements--United States.
Violence--Mexico.
Harvard subject headings:
Caravana por la Paz.
Drug control--Political aspects--Mexico.
Drug control--Political aspects--United States.
Political violence--Mexico.
Protest movements--Mexico.
Protest movements--United States
Princeton subject headings:
Caravana por la Paz.
Drug control--Political aspects--Mexico.
Drug control--Political aspects--United States.
Political violence--Mexico.
Protest movements--Mexico.
Protest movements--United States.