Columbia subject headings:
Students--Political activity--Mexico--Tlatelolco (Mexico City)
Harvard subject headings:
Mexico--Politics and government--1946-1970
Student movements--Mexico City--Mexico City--History--20th century.
Student movements--Mexico--Mexico City--History--20th century.
Students--Mexico--Mexico City--Political activity--History--20th century.
Students--Political activity--Mexico--Tlatelolco.
Princeton subject headings:
Students--Mexico--Tlatelolco--Political activity.