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Subseries 4. Maps of Pennsylvania Counties (oversize)

Folder 3 Allegheny Co., Washington Co.
Folder 4 Warren Co., Westmoreland Co., Tioga Co., Clarion Co., Knox, PA
Folder 5 Centre Co., Clearfield Co., Fulton Co., Jefferson Co., Greene Co.
Folder 6 Butler Co., Clinton Co., Blair Co., Bedford Co., Clearfield Co., Cambria Co., Scrubgrass Creek
Folder 7 Butler Co., Westmoreland Co., Beaver Co., Fayette Co., Clearfield Co.