1. Albert, R. C. (1988). The historical context of water quality management for the Delaware Estuary. Estuaries, 11(2), 99–107.
2. Albert, R. C. (1991). Human use: Pollution. The Delaware Estuary: Rediscovering a forgotten resource (144 pp). Newark, Delaware: University of Delaware Sea Grant College Program.
3. Associated Press (2007). Bald eagle nest found in Philadelphia. Philadelphia Inquirer, March 17, 2007.
4. Atlantic States Marine Fisheries Commission (2008). Public information document for amendment 3 to the interstate fishery management plan for shad and river herring.
5. Cech, T. V. (2003). Principles of water resources history, development, management and policy (446 pp.). New York: Wiley.