Columbia subject headings:
Harvard subject headings:
Germany--Military relations--Italy.
Italy--Military relations--Germany.
World War, 1939-1945--Aerial operations, German.
World War, 1939-1945--Aerial operations, Italian.
Princeton subject headings:
Aeronautics, Military--Germany--History.
Aeronautics, Military--Italy--History.
World War, 1939-1945--Aerial operations.