Columbia subject headings:
Great Britain--Foreign relations--Turkey.
Soviet Union--Foreign relations--Turkey.
Turkey--Foreign relations--Great Britain.
Turkey--Foreign relations--Soviet Union.
Turkey--History--1683-1829.
Turkey--History--1829-1878.
Harvard subject headings:
Great Britain--Foreign relations--Turkey.
Soviet Union--Foreign relations--Turkey.
Turkey--Foreign relations--Great Britain.
Turkey--Foreign relations--Soviet Union.
Turkey--History--Tanzimat, 1839-1876.
Princeton subject headings:
Great Britain--Foreign relations--Turkey.
Russia--Foreign relations--Turkey.
Turkey--Foreign relations--Great Britain.
Turkey--Foreign relations--Russia.
Turkey--History--1683-1829.
Turkey--History--1829-1878.