Columbia subject headings:
Eastern question (Balkan)
Europe--Foreign relations--1871-1918.
Europe--Foreign relations--1918-1945.
Europe--Foreign relations--Turkey.
Great powers.
Turkey--Foreign relations--Europe.
Harvard subject headings:
Eastern question (Balkan)
Europe--Foreign relations--1871-1918.
Europe--Foreign relations--1918-1945.
Europe--Foreign relations--Turkey.
Great powers.
Turkey--Foreign relations--Europe.
Princeton subject headings:
Eastern question (Balkan)
Europe--Foreign relations--1871-1918.
Europe--Foreign relations--1918-1945.
Europe--Foreign relations--Turkey.
Great powers.
Turkey--Foreign relations--Europe.