United States. Geological Survey. U.S.G.S. Alternate title: Camden. On upper margin: Topographic Sheet. Relief shown by 20 feet contour interval. Surveyed in 1886 and 1894. Triangulation by U.S. Coast and Geodetic Survey, Geol. Survey of New Jersey and City of Philadelphia. Verso: legend and explanatory notes, "Description of the topographic map of the United States". 1901