Digital Maps and Geospatial Data | Princeton University
Pennsylvania: Du Bois Quadrangle
- [Washington, D.C.] : U.S. Geological Survey, 1924.
- United States. Geological Survey. U.S.G.S. Alternate title: Du Bois, PA. Polyconic projection. Relief shown by 20 feet contour interval and spot heights. Surveyed in 1922. Verso: The topographic maps of the United States.
- Topographic maps
- Call number:
- G3821.C2.s62.U5G4 Du Bois
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- No Known Copyright
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