Columbia subject headings:
Bosporus (Turkey)
Dardanelles Strait (Turkey)
Eastern question (Balkan)
Straits question.
Turkey--Foreign relations.
Harvard subject headings:
Bosporus (Turkey).
Dardanelles Strait (Turkey).
Eastern question (Balkan)
Straits question
Turkey--Foreign relations.
Princeton subject headings:
Bosporus (Turkey)
Dardanelles (Turkey)
Eastern question (Balkan)
Straits question.
Turkey--Foreign relations.