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