1. Delaware River - Philadelphia, Pa. to Trenton, N.J. - Survey of 1951 - Index map Maps Public content 1951. Index map of Delaware River - Philadelphia, Pa. to Trenton, N.J. from a survey of 1951.
2. Delaware River harbor lines - Trenton and Morrisville - Resurveyed 1939 Maps Public content 1951. Map showing the Delaware River harbor lines - Trenton and Morrisville - Resurveyed 1939.