Columbia subject headings:
Arlington (Va.)--Buildings, structures, etc.
Arlington National Cemetery (Arlington, Va.)--History.
Heroes--United States--Biography.
Soldiers--United States--Biography.
Tomb of the Unknowns (Va.)
United States--History, Military.
War memorials--Virginia.
World War, 1914-1918--Missing in action--Biography.
Harvard subject headings:
Arlington (Va.)--Buildings, structures, etc.
Arlington National Cemetery (Arlington, Va.)--History.
Heroes--United States--Biography
Soldiers--United States--Biography
Tomb of the Unknowns (Va.)
United States--History, Military.
War memorials--Virginia
World War, 1914-1918--Missing in action--Biography.
Princeton subject headings:
Arlington National Cemetery (Arlington, Va.)
Sepulchral monuments--Virginia.
Tomb of the Unknowns (Va.)
United States--Armed Forces--History.
War memorials--Virginia.
World War, 1914-1918--Biography.
World War, 1914-1918--Missing in action--Biography.