Columbia subject headings:
Harvard subject headings:
Antiaircraft guns--History--20th century.
World War, 1939-1945--Aerial operations
World War, 1939-1945--Antiaircraft artillery operations
Princeton subject headings:
Antiaircraft guns--History--20th century.
World War, 1939-1945--Aerial operations.
World War, 1939-1945--Antiaircraft artillery operations.