United States. Geological Survey. U.S.G.S. Alternate title: Greenwood Lake. Relief shown by 20 feet contour intervals. Triangulation by U.S. Coast and Geodetic Survey and New Jersey Geological Survey. Topography by New Jersey Geological Survey and R.D. Cummin. Surveyed in 1882-8. Verso: legend and explanatory notes, " The topographic maps of the United States".