Columbia subject headings:
Germany. Luftwaffe--History--World War, 1939-1945.
Great Britain. Royal Air Force--History--World War, 1939-1945.
United States. Army Air Forces--History--World War, 1939-1945.
World War, 1939-1945--Aerial operations.
World War, 1939-1945--Campaigns--Western Front.
Harvard subject headings:
Germany. Luftwaffe--History--World War, 1939-1945.
Great Britain. Royal Air Force--History--World War, 1939-1945.
United States. Army Air Forces--History--World War, 1939-1945.
World War, 1939-1945--Aerial operations
World War, 1939-1945--Campaigns--Western Front.
Princeton subject headings:
Germany. Luftwaffe--History--World War, 1939-1945.
Great Britain. Royal Air Force--History--World War, 1939-1945.
United States. Army Air Forces--History--World War, 1939-1945.
World War, 1939-1945--Aerial operations.
World War, 1939-1945--Campaigns--Western Front.