New Jersey. Department of Environmental Protection. Division of Water Resources. Atlas Sheet 24 (1976) New Jersey Geological Survey. Relief shown by 20 ft contour interval and spot heights. Title is not given. Region covered: northern Warren, northern Hunterdon and western Morris counties. Original survey made under the direction of C. C. Vermeule, Topographer, in 180-3. 1948 revision by R. G. Blanchard, Topographic Engineer.Revision of 1976 by William P. Graff, Cartographer, Bureau of Geology and Topography. Based on 1972 aerial photography supervised by Geoge J. Halasi-Kun, Topographic Engineer. In lower margin: Sheet 24: topographic series.