Columbia subject headings:
Eastern question (Balkan)
Europe--Foreign relations--Soviet Union.
Greece--History--War of Independence, 1821-1829.
Soviet Union--Foreign relations--Europe.
Harvard subject headings:
Eastern question (Balkan)
Europe--Foreign relations--Soviet Union.
Greece--History--War of Independence, 1821-1829.
Soviet Union--Foreign relations--Europe.
Princeton subject headings:
Eastern question (Balkan)
Europe--Foreign relations--Soviet Union.
Greece--History--War of Independence, 1821-1829.
Soviet Union--Foreign relations--Europe.