1. Standard for Permanent Record Photographic Microcopying Film, National Bureau of Standards, September 14th, 1943.
2. American Standard Specification for Films for Permanent Records.
3. American Standard Methods for Predicting the Permanency of the Silver Images of Proce sed Films, Plates and Papers. Z.38.8.18- 1948.
4. Lightfastness Tester "Xenotest" System Cassella, Original Hanau Quarzlampen Gesellschaft Hanau.
5. Horowitz., P. and Weller, W. R. Considerations of Eastman Color Print Film Dye Stability. J.S.M.P.T.E. 6, June 1958, p. 401-404.