Columbia subject headings:
Elections--Mexico.
Mexico--Politics and government--1988-2000.
Voting research--Mexico.
Harvard subject headings:
Elections--Mexico
Mexico--Politics and government--1988-
Mexico--Politics and government--1988-2000.
Voting research--Mexico.
Princeton subject headings:
Elections--Mexico.
Mexico--Politics and government--1988-2000.
Voting research--Mexico.