Columbia subject headings:
Agriculture and state--Mexico.
Land reform--Mexico.
Peasants--Political activity--Mexico.
Harvard subject headings:
Agriculture and state--Mexico.
Land reform--Mexico.
Peasants--Mexico--Political activity.
Princeton subject headings:
Agricultural laborers--Labor unions--Mexico.
Agriculture and state--Mexico.
Agriculture, Cooperative--Political aspects--Mexico.
Peasants--Mexico--Political activity.