Columbia subject headings:
Escuela Nacional de Agricultura (Mexico)--Students--Political activity--History--20th century.
Student movements--Mexico--History--20th century.
Harvard subject headings:
College students--Political activity--Mexico--History--20th century.
Escuela Nacional de Agricultura (Mexico)--Students--Political activity.
Student movements--Mexico--History--20th century
Princeton subject headings:
Student movements--Mexico--History--20th century.
Universidad Autónoma Chapingo--History.