Columbia subject headings:
Bosporus (Turkey)
Dardanelles Strait (Turkey)
Eastern question (Balkan)
Harvard subject headings:
Bosporus (Turkey)
Dardanelles (Turkey)
Dardanelles Strait (Turkey)
Eastern question (Balkan)
Princeton subject headings:
Bosporus (Turkey)
Dardanelles (Turkey)
Eastern question (Balkan)