Woodruff, K.D.2008-04-102008-04-101977http://udspace.udel.edu/handle/19716/3179This map has two sheets listed as separate files.en-USGeohydrologyNewark, DelawareCoastal PlainPotomac FormationHoloceneCretaceousColumbia FormationCockeysville FormationWissahickon FormationGeohydrology of the Newark Area, DelawareMap