Columbia subject headings:
Harvard subject headings:
Partido Revolucionario Institucional--History.
Political parties--Mexico--Saltillo (Coahuila)--History.
Saltillo (Coahuila, Mexico)--Politics and government.
Princeton subject headings:
Partido Revolucionario Institucional--History.
Political parties--Mexico--Saltillo (Coahuila)--History.
Saltillo (Coahuila, Mexico)--Politics and government.