Columbia subject headings:
Harvard subject headings:
Former Soviet republics--Foreign relations--Congresses.
Regionalism--Former Soviet republics--Congresses.
Princeton subject headings:
Former Soviet republics--History.
Former Soviet republics--Politics and government.
Former Soviet republics--Social conditions.
Russia--History--20th century.
Russia--Politics and government--20th century.
Russia--Social conditions--20th century.