Columbia subject headings:
Harvard subject headings:
Great Britain. Royal Navy--History--World War, 1939-1945.
World War, 1939-1945--English Channel.
World War, 1939-1945--Naval operations, British.
World War, 1939-1945--Naval operations, German.
Princeton subject headings:
World War, 1939-1945--Campaigns--English Channel.
World War, 1939-1945--Naval operations, German.