Columbia subject headings:
Education--Economic aspects--Mexico.
Mexico--Economic conditions.
Mexico--Politics and government--1910-1946.
Mexico--Politics and government--1946-1970.
Harvard subject headings:
Education--Economic aspects--Mexico
Mexico--Economic conditions.
Mexico--Politics and government--1910-1946.
Mexico--Politics and government--1946-1970
Princeton subject headings:
Agriculture and state--Mexico.
Education and state--Mexico.
Education--Mexico.