Columbia subject headings:
Aeronautics, Military--Great Britain.
Air defenses--Great Britain.
World War, 1939-1945--Great Britain.
Harvard subject headings:
Aeronautics, Military--Great Britain.
Air defenses--Great Britain.
World War, 1939-1945--Great Britain.
Princeton subject headings:
Aeronautics, Military--Great Britain.
Great Britain--Air defenses.
World War, 1939-1945--Great Britain.