Columbia subject headings:
World War, 1939-1945--Aerial operations, American.
World War, 1939-1945--Aerial operations, British.
World War, 1939-1945--Aerial operations, German.
World War, 1939-1945--England.
World War, 1939-1945--Germany.
Harvard subject headings:
Princeton subject headings:
World War, 1939-1945--Aerial operations, British.
World War, 1939-1945--Aerial operations, German.
World War, 1939-1945--Aerial operations.