United States. Geological Survey. U.S.G.S. Alternate title: Bay Side, NJ--DEL. Relief shown by 10 feet contour interval. Surveyed in 1886-9 and 1927. Culture and drainage in Delaware in part compiled from aerial photographs taken by Air Corps, U.S. Army, Control by U.S.Geological Survey and U.S.Coast and Geodetic Survey. Verso: legend and explanatory notes, "The topographic maps of the United States".