Columbia subject headings:
New York (N.Y.)--Buildings, structures, etc.
New York (N.Y.)--Guidebooks.
New York (N.Y.)--Tours.
Walking--New York (State)--New York--Guidebooks.
Harvard subject headings:
New York (N.Y.)--Buildings, structures, etc.--Guidebooks.
Upper East Side (New York, N.Y.)--Tours.
Princeton subject headings: