Columbia subject headings:
Harvard subject headings:
Aircraft accidents--Europe--History.
War crimes--Europe--History.
World War, 1939-1945--Aerial operations
World War, 1939-1945--Aerial operations, German.
World War, 1939-1945--Atrocities--Europe.
Princeton subject headings:
Aircraft accidents--Europe--History.
War crimes--Europe--History.
World War, 1939-1945--Aerial operations, German.
World War, 1939-1945--Aerial operations.
World War, 1939-1945--Atrocities--Europe.