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Subject
Administrative and political boundaries
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Place
Pennsylvania
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Year
1907
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1 entry found
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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.