Columbia subject headings:
Harvard subject headings:
Czech Republic--Politics and government--20th century.
Korea (North)--Politics and government--20th century.
World politics--1989-
Princeton subject headings:
Czech Republic--Politics and government--1993-
Czechoslovakia--Politics and government--1968-1989.
Czechoslovakia--Politics and government--1989-1992.
Korea (North)--Politics and government--1994-2011.
Korea (North)--Politics and government--2011-
World politics--1989-