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2. J.C. Roberts, Proceedings of SPIE-The International Society for Optical Engineering, Bellingham, WA, 1997, 3227 (Interactive Paper), pp. 20-39.
3. J.C. Roberts, inFundamentals of Papermaking Materials, C.F. Baker (Ed.), Transaction of the Fundamental Research Symposium, 11th, Cambridge, U.K., September 1997, Vol.1, pp.209-263.