Columbia subject headings:
Harvard subject headings:
Europe--History--1918-1945.
Operation Overlord
World War, 1939-1945--Campaigns--France--Normandy.
World War, 1939-1945--Campaigns--Western Front.
Princeton subject headings:
Europe--History--1918-1945.
Operation Overlord.
World War, 1939-1945--Campaigns--France--Normandy.
World War, 1939-1945--Campaigns--Western Front.