Columbia subject headings:
Europe, Central--Foreign relations.
Europe, Central--Politics and government.
Europe, Eastern--Foreign relations.
Europe, Eastern--Politics and government--1989-
Harvard subject headings:
Europe, Central--Foreign relations.
Europe, Central--Politics and government.
Europe, Eastern--Foreign relations.
Europe, Eastern--Politics and government--1989-
Princeton subject headings:
Europe, Central--Foreign relations.
Europe, Central--Politics and government.
Europe, Eastern--Foreign relations.
Europe, Eastern--Politics and government--1989-