Columbia subject headings:
Central America--Politics and government--1821-1951.
Central America--Politics and government--1951-1979.
Harvard subject headings:
Central America--Politics and government--1821-1951.
Central America--Politics and government--1951-
Princeton subject headings:
Central America--Politics and government--1821-1951.
Central America--Politics and government--1951-1979.
Central America--Politics and government--1979-