Columbia subject headings:
Former Soviet republics--History.
Russia (Federation)--Foreign relations.
Russia (Federation)--History.
Soviet Union--History.
Harvard subject headings:
Former Soviet republics.
International relations--History--20th century
International relations--History--21st century
Princeton subject headings:
Former Soviet republics--History.
Russia (Federation)--Foreign relations.
Russia (Federation)--History.
Soviet Union--History.