Columbia subject headings:
Harvard subject headings:
Bombing, Aerial--Germany--History.
World War, 1939-1945--Aerial operations, American.
World War, 1939-1945--Aerial operations, British.
World War, 1939-1945--Campaigns--Germany.
Princeton subject headings:
Bombing, Aerial--Germany--History--20th century.
World War, 1939-1945--Aerial operations, American.
World War, 1939-1945--Aerial operations, British.
World War, 1939-1945--Destruction and pillage--Germany.
World War, 1939-1945--Moral and ethical aspects.