- http://www.metmuseum.org/toah/hd/tlbt/hd_tlbt.htm
- http://www.getty.edu/art/gettyguide/artMakerDetails?maker=2084
- http://www.welshwales.co.uk/images.htm
- http://www.getty.edu/art/gettyguide/artMakerDetails?maker=1876
- http://memory.loc.gov/ammem/daghtml/dagdag.html
- http://www.mhs.ox.ac.uk/features/ephotos/ctypes.htm
- http://www.flashcardmachine.com/photo-exam1.html
- http://www.frederickscottarcher.com/Collodion/page/Frederick-Scott-Archer-Biography.aspx
- http://en.wikipedia.org/wiki/Richard_Avedon
- http://en.wikipedia.org/wiki/J-SH04
- http://en.wikipedia.org/wiki/Photo_CD
- http://www.pbs.org/wgbh/amex/eastman/timeline/index_3.html
- http://en.wikipedia.org/wiki/Tim_Berners-Lee
- http://en.wikipedia.org/wiki/Les_Horribles_Cernettes
- Reference: Timeframes - The Story of Photography Book by Jeffrey, Ian
- Seizing The Light - A History of Photograph Book by Robert Hirsch
- http://en.wikipedia.org/wiki/Timeline_of_photography_technology)