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You searched for: Subject Imagery and Base Maps Remove constraint Subject: Imagery and Base Maps Subject Topographic quadrangles Remove constraint Subject: Topographic quadrangles Place Pennsylvania, United States Remove constraint Place: Pennsylvania, United States Data type Vector Remove constraint Data type: 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...