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