archive.org/web/20161028071313/http://www.panoramio.com/user/2184098?with_photo_id=97773762 operator: Panoramio described at URL: https://web.archive...
1734, other settlers were building mills along the Wissahickon Creek and the Falls Creek streams in Pennsylvania. ■Don't bother trying to find the 'Schuylkill...
archive.org/web/20161025045423/http://www.panoramio.com/user/2184098?with_photo_id=70880913 operator: Panoramio described at URL: https://web.archive...
archive.org/web/20161024185400/http://www.panoramio.com/user/2184098?with_photo_id=70888073 operator: Panoramio described at URL: https://web.archive...
archive.org/web/20161028151919/http://www.panoramio.com/user/2184098?with_photo_id=100230409 operator: Panoramio described at URL: https://web.archive...
archive.org/web/20161030050044/http://www.panoramio.com/user/2184098?with_photo_id=92032708 operator: Panoramio described at URL: https://web.archive...
archive.org/web/20161028085342/http://www.panoramio.com/user/2184098?with_photo_id=100577033 operator: Panoramio described at URL: https://web.archive...
archive.org/web/20161025101851/http://www.panoramio.com/user/2184098?with_photo_id=88087122 operator: Panoramio described at URL: https://web.archive...
archive.org/web/20161030063920/http://www.panoramio.com/user/2184098?with_photo_id=100577061 operator: Panoramio described at URL: https://web.archive...
English operator: Panoramio described at URL: https://web.archive.org/web/20161031080847/http://www.panoramio.com/photo/113934777 determination method:...
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