Digital Maps and Geospatial Data | Princeton University
Pennsylvania: Ridgway Quadrangle 15-minute series
- [Reston, Va.] : U.S. Geological Survey, 1944.
- United States. Geological Survey. U.S.G.S. Alternate title: Ridgway, PA. Polyconic projection. Relief shown by 20 feet contour interval and spot heights. Surveyed in 1940-1941. Verso: The topographic maps of the United States.
- Topographic maps
- Call number:
- G3821.C2.s62.U5G4 Ridgway
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- No Known Copyright
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