Columbia subject headings:
Harvard subject headings:
Agricultural laborers--Labor unions--Mexico--History.
Agriculture and state--Mexico.
Confederación Nacional Campesina (Mexico)
Peasants--Mexico--Political activity.
Peasants--Mexico--Societies, etc.
Princeton subject headings:
Agricultural laborers--Labor unions--Mexico--History.
Agriculture and state--Mexico.
Confederación Nacional Campesina (Mexico)
Peasants--Mexico--Political activity.
Peasants--Mexico--Societies, etc.