Columbia subject headings:
Bombing, Aerial.
Great Britain. Royal Air Force. Bomber Command.
World War, 1939-1945--Aerial operations, British.
World War, 1939-1945--Destruction and pillage--Germany.
Harvard subject headings:
Great Britain. Royal Air Force--History--World War, 1939-1945.
World War, 1939-1945--Aerial operations, British.
World War, 1939-1945--Campaigns--Germany.
Princeton subject headings:
Great Britain. Royal Air Force--History--World War, 1939-1945.
World War, 1939-1945--Aerial operations, British.
World War, 1939-1945--Campaigns--Germany.