Columbia subject headings:
Indians of Mexico--Politics and government--20th century.
Mexico--Ethnic relations.
Mexico--Politics and government--20th century.
Socialism--Mexico.
Harvard subject headings:
Indians of Mexico--Politics and government--20th century.
Mexico--Ethnic relations.
Mexico--Politics and government--20th century.
Socialism--Mexico
Princeton subject headings:
Indians of Mexico--Politics and government--20th century.
Mexico--Ethnic relations.
Mexico--Politics and government--20th century.
Socialism--Mexico.