Digital Maps and Geospatial Data | Princeton University
Pennsylvania: Lykens Quadrangle
- [Washington, D.C.] : U.S. Geological Survey, 1893.
- United States. Geological Survey. U.S.G.S. Alternate title: PA. Lykens. Polyconic projection. Relief shown by 20 feet contour interval and spot heights. Surveyed in 1889. Triangulation by S. S. Gannett. Verso: The topographic maps of the United States.
- Topographic maps
- Call number:
- G3821.C2.s62.U5G4 Lykens 1939
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