Columbia subject headings:
Czechoslovakia--Politics and government--1968-1989.
Czechoslovakia--Politics and government--1989-1992.
Soviet Union--History--Revolution, 1917-1921--Participation, Foreign.
Harvard subject headings:
Czechoslovakia--Politics and government--1968-1989
Czechoslovakia--Politics and government--1989-1992
Princeton subject headings:
Czechoslovakia--Politics and government--1968-1989.
Czechoslovakia--Politics and government--1989-1992.