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Pennsylvania
Map Lovers’ Monday: Schuylkill River from Wissahickon Creek to Norristown, 1913
Roberts Mill, Wingohocking Creek, 1871
Report on channelization of Frankford Creek for flood control (1947)
Panoramic Manayunk: Views Past and Present
Schuylkill Navigation Company Scrapbook
Philadelphia the Manufacturing and Industrial Capital map, 1906
Baldwin Locomotive Works