English operator: Panoramio described at URL: https://web.archive.org/web/20161101120102/http://www.panoramio.com/photo/113933963...
English Pennsylvania Railroad locomotive 1361 displayed at Horseshoe Curve in the early 1980s...
English operator: Panoramio described at URL: https://web.archive.org/web/20161101071442/http://www.panoramio.com/photo/113934001...
English operator: Panoramio described at URL: https://web.archive.org/web/20161031190104/http://www.panoramio.com/photo/113934015...
English operator: Panoramio described at URL: https://web.archive.org/web/20161102210801/http://www.panoramio.com/photo/113933982...
English operator: Panoramio described at URL: https://web.archive.org/web/20161101170407/http://www.panoramio.com/photo/113934069...
English operator: Panoramio described at URL: https://web.archive.org/web/20161031094359/http://www.panoramio.com/photo/113934196...
English operator: Panoramio described at URL: https://web.archive.org/web/20161030232956/http://www.panoramio.com/photo/113934054 determination method...
English operator: Panoramio described at URL: https://web.archive.org/web/20161030161929/http://www.panoramio.com/photo/113934144...
English operator: Panoramio described at URL: https://web.archive.org/web/20161101120214/http://www.panoramio.com/photo/113933967...