Columbia subject headings:
Harvard subject headings:
Aeronautics, Military--Great Britain.
World War, 1914-1918--Personal narratives, British.
World War, 1939-1945--Personal narratives, British.
Princeton subject headings:
Aeronautics, Military--Great Britain.
World War, 1914-1918--Personal narratives, English.
World War, 1939-1945--Personal narratives, British.