Columbia subject headings:
Harvard subject headings:
Canada. Royal Canadian Navy--History.
Naval convoys--Canada--History--20th century.
World War, 1939-1945--Campaigns--Atlantic Ocean.
World War, 1939-1945--Naval operations, Canadian.
Princeton subject headings:
Canada. Royal Canadian Navy--History.
World War, 1939-1945--Campaigns--Atlantic Ocean.
World War, 1939-1945--Naval operations, Canadian.