Columbia subject headings:
Harvard subject headings:
Democracy--Mexico
Mexico--Politics and government--1988-
Representative government and representation--Mexico
Princeton subject headings:
Democracy--Mexico--Congresses.
Mexico--Economic conditions--1994---Congresses.
Mexico--Politics and government--1988-2000--Congresses.
Mexico--Politics and government--2000---Congresses.
Mexico--Social conditions--1970---Congresses.