New Jersey. Department of Conservation and Development. Division of Geology and Topography. Atlas Sheet 24 (1930) New Jersey Geological Survey. Relief shown by 20 ft contour interval. Title is not given. Region covered: northern Warren, northern Hunterdon and western Morris counties. Original survey 1882 and 1883, principal features revised 1903, 1920, 1929. Original survey and revision to 1903 made under direction of C. C. Vermeule, Topographer. Revision of 1920 by Henry B. Kummel. Revision of 1929 by L. P. Plummer, Topographic Engineer.