Leiutised Ameerikas 19. - 20. sajandil
com/watch?v=OvAHcPgcI2E
http://americanhistory.si.edu/lighting/19thcent/promo19.htm
https://www.youtube.com/watch?v=qo0kpCU03-U
http://en.wikipedia.org/wiki/Wright_brothers
http://et.wikipedia.org/wiki/Alexander_Graham_Bell
http://www.history.com/topics/inventions/alexander-graham-bell
http://www.biography.com/people/alexander-graham-bell-9205497#pursuing-his-
passion
https://www.youtube.com/watch?v=VGWeQ2kIPKY
http://en.wikipedia.org/wiki/Henry_Ford
http://www.biography.com/people/henry-ford-9298747#philosophy-philanthropy-and-
anti-semitism
http://inventors.about.com/od/fstartinventors/a/HenryFord.htm
https://www.thehenryford.org/exhibits/hf/The_Innovator_and_Ford_Motor_Company.as
p
https://www.youtube.com/watch?v=g_qLCdrbU78
http://www.britannica.com/EBchecked/topic/273503/Elias-Howe
http://en.wikipedia.org/wiki/Sewing_machine
http://www.tapamuuseum.ee/?leht=vanaaeg
Leonad De Vries 1985 „Sajanditagused tehnikaimed“. Tallinn Valgus
annaabi.ee 
