- http://img.timeinc.net/time/magazine/archive/covers/2010/1101100705_400.jpg
- http://www.writework.com/essay/impact-technology-america-late-1800-s
- http://kclibrary.lonestar.edu/19thcentury1870.htm
- inventors.about.com/od/estartinventors/a/Edison
- http://www.historycentral.com/NN/America/Cities.html
- http://xroads.virginia.edu/~class/am485_98/brady/edison/life.html
- http://www.writework.com/essay/impact-technology-america-late-1800-s
- http://kclibrary.lonestar.edu/19thcentury1870.htm
- inventors.about.com/od/estartinventors/a/Edison
- http://www.historycentral.com/NN/America/Cities.html
- http://xroads.virginia.edu/~class/am485_98/brady/edison/life.html