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USGS - Historic Quads
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USGS - Historic Quads
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USGS - Historic Quads
Williamsport 1962/1975 (ver. 1)
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USGS - Historic Quads
Williamsport 1962/1975 (ver. 2)
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USGS - Historic Quads
Williamsport 1962/1966 Planimetric
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USGS - Historic Quads
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USGS - Historic Quads
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USGS - Historic Quads
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USGS - Historic Quads