Columbia subject headings:
Greece--Politics and government--1453-1821.
Greece--Relations--Soviet Union.
Soviet Union--Relations--Greece.
Ushakov, Fedor Fedorovich, 1745-1817.
Harvard subject headings:
Greece--Politics and government--1453-1821.
Greece--Relations--Soviet Union.
Soviet Union--Relations--Greece.
Ushakov, Fedor Fedorovich, 1745-1817.
Princeton subject headings:
Ionian Islands (Greece)--History.
Ushakov, Fedor Fedorovich, 1745-1817.