Columbia subject headings:
Former Soviet republics--History--Dictionaries.
Russia--History--Dictionaries.
Harvard subject headings:
Former Soviet republics--History--Dictionaries.
Russia--History--Dictionaries.
Soviet Union--History--Dictionaries.
Princeton subject headings:
Former Soviet republics--History--Encyclopedias.
Russia--History--Encyclopedias.
Soviet Union--History--Encyclopedias.