Frank Julian Sprague: diferenças entre revisões
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==Ligações externas==
*[http://www.arlingtoncemetery.net/fjsprague.htm Arlington National Cemetery]
*[https://web.archive.org/web/20060621111838/http://www.ieee.org/organizations/history_center/milestones_photos/richmond.html Frank J. Sprague historical information]
*[http://www.theelevatormuseum.org/e/e-1.htm Another page about Frank J. Sprague]
*[http://www.bera.org/articles/sprague.html Shore Line Trolley Museum - new permanent exhibit: "Frank J. Sprague: Inventor, Scientist, Engineer"]
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