Columbia subject headings:
World War, 1939-1945--Aerial operations, British.
World War, 1939-1945--Campaigns--Europe, Southern.
Harvard subject headings:
World War, 1939-1945--Aerial operations, British.
World War, 1939-1945--Aerial operations, English.
World War, 1939-1945--Campaigns--Europe, Southern.
Princeton subject headings:
World War, 1939-1945--Greece--Aerial operations.
World War, 1939-1945--Greece--Crete--Aerial operations.
World War, 1939-1945--Yugoslavia--Aerial operations.