Columbia subject headings:
Harvard subject headings:
Eastern question.
Russia--Foreign relations--1689-1801.
Russia--Foreign relations--Turkey.
Russia--Politics and government--1689-1801.
Soviet Union--Foreign relations--Turkey.
Turkey--Foreign relations--Russia.
Turkey--Foreign relations--Soviet Union.
Turkey--Politics and government.
Princeton subject headings:
Russia--Foreign relations--1689-1801.
Russia--Foreign relations--Turkey.
Turkey--Foreign relations--Russia.