Columbia subject headings:
New York (N.Y.)--Buildings, structures, etc.
United Nations--Headquarters--Pictorial works.
Harvard subject headings:
Architecture, Modern--20th century--New York (State)--New York.
New York (N.Y.)--Buildings, structures, etc.
United Nations--Buildings.
United Nations--Headquarters--Pictorial works.
Princeton subject headings:
United Nations--Headquarter.
United Nations--History.