Columbia subject headings:
Harvard subject headings:
Airplanes, Military--History--20th century--Exhibitions.
Verdun (France)--History, Military--20th century--Exhibitions.
Verdun, Battle of, Verdun, France, 1916--Exhibitions.
World War, 1914-1918--Aerial operations--Exhibitions.
World War, 1914-1918--Campaigns--France--Verdun--Exhibitions.
Princeton subject headings:
Airplanes, Military--History--20th century--Exhibitions.
Verdun (France)--History, Military--20th century--Exhibitions.
Verdun, Battle of, Verdun, France, 1916--Exhibitions.
World War, 1914-1918--Aerial operations--Exhibitions.
World War, 1914-1918--Campaigns--France--Verdun--Exhibitions.