Columbia subject headings:
Harvard subject headings:
Agricultural laborers--Labor unions--Mexico--Michoacán de Ocampo--History.
Liga de Comunidades y Sindicatos Agraristas de Michoacán.
Partido Comunista Mexicano--History.
Peasants--Mexico--Michoacán de Ocampo--Societies, etc.--History.
Princeton subject headings:
Agricultural laborers--Labor unions--Mexico--Michoacán--History.
Land reform--Mexico--Michoacán--History.
Peasants--Mexico--Michoatán--Political activity--History.