Digital Maps and Geospatial Data | Princeton University
Pennsylvania: Altoona Quadrangle
- [Washington, D.C.] : U.S. Geological Survey, 1922.
- United States. Geological Survey. U.S.G.S. Alternate title: Altoona PA. Polyconic projection. Relief shown by 20 feet contour interval and spot heights. Surveyed in 1920. Surveyed in cooperation with the State of Pennsylvania. Verso: The topographic maps of the United States.
- Topographic maps and Altoona Quadrangle (Pa.)—Maps
- Call number:
- G3821.C2.s62.U5G4 Altoona 1922
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