Columbia subject headings:
Election law--Mexico.
Elections--Mexico.
Mexico--Politics and government--1946-1970.
Mexico--Politics and government--1970-1988.
Harvard subject headings:
Election law--Mexico
Elections--Mexico
Mexico--Politics and government--1946-1970
Mexico--Politics and government--1970-1988.
Princeton subject headings:
Election law--Mexico.
Elections--Mexico.
Mexico--Politics and government--1946-1970.
Mexico--Politics and government--1970-1988.