Columbia subject headings:
Harvard subject headings:
Citizenship--Mexico--History--Congresses.
Citizenship--Study and teaching--Mexico--Congresses.
Education--Mexico--History--Congresses.
Indians of Mexico--Civil rights--Congresses.
Indians of Mexico--Government relations--Congresses.
Indians of Mexico--Politics and government--Congresses.
Princeton subject headings:
Citizenship--Mexico--History--Congresses.
Education--Mexico--History--Congresses.