Columbia subject headings:
Harvard subject headings:
Heads of state--Russia (Federation)
Heads of state--Russia.
Heads of state--Soviet Union.
Russia (Federation)--Politics and government.
Russia--Politics and government.
Soviet Union--Politics and government.
Princeton subject headings:
Heads of state--Russia (Federation).
Heads of state--Russia.
Heads of state--Soviet Union.
Russia (Federation)--Politics and government.
Russia--Politics and government.
Soviet Union--Politics and government.