Columbia subject headings:
City planning--New York (State)
City planning--New York (State)--New York.
New York (N.Y.). World Trade Center.
World Trade Center (New York, N.Y. : 1970-2001)
Harvard subject headings:
City planning--New York (State)
City planning--New York (State)--New York
New York (N.Y.)
World Trade Center (New York, N.Y.)
Princeton subject headings:
City planning--New York (State)--New York.
World Trade Center (New York, N.Y.)