Columbia subject headings:
Commercial buildings--New York (State)--New York.
New York (N.Y.)--Buildings, structures, etc.
Skyscrapers--New York (State)--New York.
World Trade Center (New York, N.Y. : 1970-2001)
Harvard subject headings:
Commercial buildings--New York (State)--New York.
New York (N.Y.)--Buildings, structures, etc.
Skyscrapers--New York (State)--New York
World Trade Center (New York, N.Y.)
Princeton subject headings:
Commercial buildings--New York (State)--New York.
New York (N.Y.)--Buildings, structures, etc.
Skyscrapers--New York (State)--New York.
World Trade Center (New York, N.Y.)