Columbia subject headings:
Crime--Mexico--History--20th century.
Criminals--Mexico--History--20th century.
Murder--Mexico--History--20th century.
Harvard subject headings:
Assassination--Mexico.
Crime--Mexico--History--20th century.
Criminals--Mexico--History--20th century.
Murder victims--Mexico.
Murder--Mexico--History--20th century.
Murder--Mexico.
Murderers--Mexico.
Violent deaths--Mexico.
Princeton subject headings: