References
^ Stroebel, Leslie, John Compton, Ira Current, and Richard Zakia (2012). 9780240804057, Focal Press, Boston. ISBN 9780240804057 (revised Oct 2013)^ John Compton, Leslie D. Stroebel, Richard D. Zakia, Ira CurrentBasic Photographic Materials and Processes by Ira Current, Leslie D. Stroebel, John Compton and Richard D. Zakia (2000, Audio, Other, Revised) ISBN 9780240804057 (revised Nov 2014)
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