1. Delaware River- Philadelphia, Pa. to Bombay Hook, Del. - Index map - Survey of 1942 Maps Public content 1943. Index map of the survey of 1942 of the Delaware River from Philadelphia, PA to Bombay Hook, DE.
2. Year 2000 land use & open space plan, adopted October 1979 Maps Public content 1979. Map of land use and open space plan presented by the Delaware Valley Regional Planning Commission.