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1. Pennsylvania: Clarion Quadrangle, 1938 reprint
1907. United States. Geological Survey. This is a scanned historical map of the Clarion Quadrangle in Pennsylvania shown at a scale of 1:62,500. This map was created by the US Geological ... US Geological Survey.
2. Pennsylvania: Rural Valley Quadrangle, 1939 reprint
1903. United States. Geological Survey. This is a scanned historical map of the Rural Valley Quadrangle in Pennsylvania shown at a scale of 1:62,500. This map was created by the US Geolog... US Geological Survey.
3. Q3 flood data, Pennsylvania
1996. Federal Emergency Management Agency. Q3 flood data for Pennsylvania, 1996. The Q3 Flood Data are derived from the Flood Insurance Rate Maps (FIRMs) published by the Federal Emergency M... Federal Emergency Management Agency.