1. D. B. Holt, in ?Quantitative Scanning Electron Microscopy?, edited by D. B. Holt, M. D. Muir, P. R. Grant and I. M. Boswarva (Academic Press, London, 1974) Ch. 8, pp. 213?86.
2. D. F. Kyser and D. B. Wittry, in ?The Electron Microprobe?, edited by T. D. McKinley, K. F. J. Heinrich and D. B. Wittry (Wiley, New York, 1964) pp. 691?714.
3. D. B. Wittry and D. F. Kyser, J. Appl. Phys. 36 (1965) 1387.
4. B. D. Chase and D. B. Holt, Phys. Stat. Sol. a19 (1973) 467.
5. D. B. Holt and B. D. Chase, ibid a20 (1973) 135.