1. KILEY, W. R. and DUNNE, J. A., 1963, A.S.T.M. Spec-Tech. Publ., No. 349, 24.
2. Report on 9th Scintillation and Semiconductor Counter Symposium, 1964, Nucleonics, 49.
3. SHIRLEY, D. A., 1965, Nucleonics, 23, 62.
4. MILLER, G. L. and GIBSON, W. M. and DONOVAN, P. F., 1962, Ann. Rev. Nuclear Sci., 12, 189.
5. BOWMAN, H. R., HYDE, E. K., THOMPSON, S. G. and JARED, R. C., 1966, Science, 151, 562