Columbia subject headings:
World War, 1914-1918--Aerial operations, British.
World War, 1939-1945--Campaigns--France--Normandy.
Harvard subject headings:
World War, 1914-1918--Aerial operations, British
World War, 1939-1945--Campaigns--France--Normandy.
Princeton subject headings:
World War, 1939-1945--Aerial operations, British.
World War, 1939-1945--Campaigns--France--Normandy.