References
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- James, T. H. Phot. Sci. Engng., 9 (2), 121-132 (1965).
- Stevens. G. W. W., and Spracklen D.M. in “Radioisotopes in the Physical Sciences and Industry”, International Atomic Encruv Agency, Vienna, 1962, p. 211.
- Wakefield. G. L. Brit. Pat. 769,421.
- Berry, C. R. in “Wissenschaftliche Photographie”. (Verlag C-Helwich) Darmstadt. 1958. p. 72.
- Newton, Sir Isaac. “Opticks” (1704) See also Paint Research Station, Teddington. England: Monthly Memorandum, July 1948.
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