1942. Map created as part of a survey made by the War Department, Corp of Engineers, U.S. Army, Washington D.C. Legend shows road classifications. War Department, Corps of Engineers, U. S. Army.
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1954. United States Geological Survey.
3. Devil's den
1976. Surveyed in 1960 by Metropolitan Grotto, the map shows entrances and crawlways under shelves. 43.2 x 58.4 cm.
1976. Surveyed in 1960 by Northern New Jersey Grotto, the map shows the main entrance, a cave within a cave, an anvil, columns, and a chimney. The map al...
1943. Map created as part of a survey made by the War Department, Corp of Engineers, U.S. Army, Washington D.C. Legend shows road classifications.
1976. This cave map was surveyed in 1960 by Kittatinny Grotto and Northern New Jersey Grotto, State of New Jersey Bureau of Geology and Topography. It sh...
1972. Aerial photograph from the NJ Department of Environmental Protection Aerial Photographs Collection showing the eastern portion of the town of Newto... NJ Department of Environmental Protection.
1972. Aerial photograph from the NJ Department of Environmental Protection Aerial Photographs Collection showing the western portion of the town of Newto... NJ Department of Environmental Protection.
1902. Surface geology south of Newton, {Sussex County, N.J.}. Final report of the State Geologist, vol. 5, 1902, plate 54.
1972. Aerial photograph from the NJ Department of Environmental Protection Aerial Photographs Collection showing the borough of Stanhope in Sussex County... NJ Department of Environmental Protection.
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