Columbia subject headings:
Mexico--Politics and government--1970-1988.
Muñoz Ledo, Porfirio.
Harvard subject headings:
Mexico--Politics and government--1988-
Muñoz Ledo, Porfirio.
Political ethics--Mexico.
Right and left (Political science)
Princeton subject headings:
Mexico--Politics and government--1970-.
Muñoz Ledo, Porfirio.