Columbia subject headings:
New York (N.Y.)--Commerce.
New York (N.Y.)--History.
New York Harbor (N.Y. and N.J.)
Harvard subject headings:
Harbors--New York (State)--New York.
New York (N.Y.)--Commerce.
New York Harbor (N.Y. and N.J.)
Princeton subject headings:
Harbors--New York (State)--New York.
New York (N.Y.)--Commerce.