References
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- Hillson, P. J., J. Photogr. Sci., 6, 97 (1958).
- Konstantinov, J. and Malinowski, J, J. Photogr. Sci., 23, 1 (1975).
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- Cramp, J. H. W. and Hillson, P. J., J. Photogr. Sci., 24, 25 (1976).
- Farnell, G. C. and Chanter, J. B., J. Photogr. Sci., 9, 73 (1961).