Columbia subject headings:
China--Politics and government--1949-1976.
China--Politics and government--1976-2002.
Harvard subject headings:
China--Politics and government--1949-1976.
China--Politics and government--1976-
China--Politics and government--1976-2002.
Princeton subject headings:
China--Politics and government--1949-1976.
China--Politics and government--1976-.