Columbia subject headings:
Delaware River Port Authority--Periodicals.
Harbors--New Jersey--Periodicals.
Harbors--Pennsylvania--Philadelphia--Periodicals.
Transportation--New Jersey--Camden Region--Periodicals.
Transportation--Pennsylvania--Philadelphia Region--Periodicals.
Harvard subject headings:
Delaware River Port Authority--Periodicals.
Harbors--New Jersey--Periodicals.
Harbors--Pennsylvania--Philadelphia--Periodicals.
Transportation--New Jersey--Camden Region--Periodicals.
Transportation--Pennsylvania--Philadelphia Region--Periodicals.
Princeton subject headings:
Bridges--Delaware River (N.Y.-Del. and N.J.)
Bridges--New Jersey--Camden.
Bridges--Pennsylvania--Philadelphia.