Columbia subject headings:
Harvard subject headings:
Airplanes, Military--Great Britain.
Great Britain. Royal Air Force
Great Britain. Royal Air Force--History--20th century.
World War, 1939-1945--Underground movements--France--Vienne.
World War, 1939-1945--Underground movements.
Princeton subject headings:
Airplanes, Military--Great Britain.
Great Britain. Royal Air Force
Great Britain. Royal Air Force.
World War, 1939-1945--Underground movements.