Columbia subject headings:
Harvard subject headings:
Great Britain--History, Naval--19th century
Great Britain--History, Naval--20th century.
Great Britain. Royal Navy--History--19th century.
Great Britain. Royal Navy--History--20th century.
Princeton subject headings:
Great Britain--History, Naval--19th century.
Great Britain--History, Naval--20th century.
Great Britain. Royal Navy--History--19th century.
Great Britain. Royal Navy--History--20th century.