Sources

http://www.gildasattic.com/dwgriffith.html
http://www.bookrags.com/research/griffith-d-w-1875-1948-sjpc-02
http://www.spartacus.schoolnet.co.uk/USAgriffith.htm
http://www.tech-notes.tv/Dig-Cine/Digitalcinema.html
http://www.filmsite.org/visualeffects1.html
http://www.aber.ac.uk/media/Documents/short/gramtv.html
http://www.filmsite.org/pre20sintro2.html http://design.osu.edu/carlson/history/timeline.html
http://www.stikkymedia.com/articles/a-history-of-cgi-in-movies
http://www.beanblossom.in.us/larryy/cgi.html
http://www.fcc.gov/omd/history/tv/1930-1959.html
http://www.high-techproductions.com/historyoftelevision.htm