Columbia subject headings:
Harvard subject headings:
Bombing, Aerial--Germany.
World War, 1939-1945--Aerial operations
Princeton subject headings:
Germany--History--Bombardment, 1940-1945.
World War, 1939-1945--Aerial operations.
World War, 1939-1945--Destruction and pillage--Germany.
World War, 1939-1945--Germany.