Robinson, Gerald H. (2006). Photography, History & Science. Carl Mautz Publishing. pp. 38 (Photo League), 43 (documentarian), 91 (Realism), 111 (influence on Ansel Adams). ISBN9781887694278. Retrieved 23 June 2020.
Strand, Paul (1987). Paul Strand. pp. 62 (dark room), 72 (AGLOSO). Retrieved 23 June 2020.