Columbia subject headings:
Harbors--New York (State)--New York--Statistics--Periodicals.
Shipping--New York (State)--New York--Statistics--Periodicals.
United States--Commerce--Statistics--Periodicals.
Harvard subject headings:
Harbors--New York (State)--New York--Statistics--Periodicals.
Shipping--New York (State)--New York--Statistics--Periodicals.
United States--Commerce--Statistics--Periodicals.
Princeton subject headings:
Harbors--New York (State)--New York--Statistics--Periodicals.
Periodicals.
Shipping--New York (State)--New York--Statistics--Periodicals.
Statistics.
United States--Commerce--Statistics--Periodicals.