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