Columbia subject headings:
Europe--History, Naval.
Sea-power--Europe--History.
Harvard subject headings:
Battleships--Europe--History.
Europe--History, Naval.
Naval art and science--Europe--History.
Sea-power--Europe--History.
Sea-power--History.
Princeton subject headings:
Battleships--Europe--History.
Europe--History, Naval.
Naval art and science--Europe--History.
Sea-power--Europe--History.
Sea-power--History.