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Delaware (Sussex County): Cape Henlopen Quadrangle
- [Washington, D.C.] : U.S. Geological Survey, 1918.
United States. Geological Survey. U.S.G.S. Alternate title: Cape Henlopen. Relief shown by 10 feet contour interval and spot heights. Surveyed in 1917. Surveyed in cooperation with the War Department. Verso: The topographic maps of the United States.
- Topographic maps
- Call number:
- G3831.C2.s62.U5G4 Cape Henlopen
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