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"Map of Road to Avoid Inclined Planes on the Allegheny Portage R.R. From the Tunnel (at Summit) to Duncansville as Surveyed by R. Faries, C.E.," n.d. (6 sections)
  • Name of creator(s): 13
  • Forms Part of: [Series RG-017-YBCC-452] Map Books 1810-1881, undated
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1 Canals 1 Engineers 1 Maps