References
http://www.photohistorytimeline.com/?page_id=52
http://timelineofart.weebly.com/1850---1900.html
https://prezi.com/nc_fkthh_kqw/history-of-photography-1850-1900/
http://www.neatorama.com/2006/08/29/the-wonderful-world-of-early-photography/
http://www.metmuseum.org/toah/hd/frph/hd_frph.htm
https://prezi.com/nhgigfe_yqc9/1800-1850-photography/
https://scheong.wordpress.com/2013/01/18/say-cheese-a-history-of-early-photography/
http://timelineofart.weebly.com/the-20th-century.html
https://www.khanacademy.org/humanities/becoming-modern/early-photography/a/daguerre-paris-boulevard
http://www.biography.com/people/robert-capa-9237294
http://www.icp.org/browse/archive/constituents/robert-capa?all/all/all/all/0
http://www.magnumphotos.com/C.aspx?VP3=SearchResult&ALID=29YL535ZXX00
http://www.biography.com/people/richard-avedon-9193034#profile