Columbia subject headings:
Azov, Sea of (Ukraine and Russia)--History, Military--17th century.
Bosporus (Turkey)--History, Naval--17th century.
Cossacks--History, Military--17th century.
Russia--History, Naval--17th century.
Turkey--History, Naval--Ottoman Empire, 1288-1918--17th century.
Harvard subject headings:
Bosporus (Turkey)--History.
Cossacks--History.
Princeton subject headings:
Bosporus (Turkey)--History, Naval--17th century.
Russia--History, Naval--17th century.
Turkey--History--Ottoman Empire, 1288-1918.