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Author
U.S. Geological Survey
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Public
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Subject
Topographic quadrangles
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Penn State
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Pennsylvania, United States
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Vector
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1. Historic topographic maps for Pennsylvania
2005. U.S. Geological Survey. Historic USGS 15 minute topographic maps for Pennsylvania as collected from the MapTech Historical Map Collection at 'http://historical.maptech.com...
2. Historic topographic maps for Pennsylvania, Version 2 (Albers)
2006. U.S. Geological Survey. A newly revised version of the historic USGS 15 minute topographic maps for Pennsylvania as collected from the MapTech Historical Map Collection at...