Columbia subject headings:
Airplanes, Military--History.
Fighter planes--History.
World War, 1914-1918--Aerial operations.
Harvard subject headings:
Airplanes, Military--History
Fighter planes--History
World War, 1914-1918--Aerial operations
Princeton subject headings:
Airplanes, Military--History.
Fighter planes--History.
World War, 1914-1918--Aerial operations.