1. D. H. Wilkinson, Ionization Chambers and Counters, Cambridge University Press (1950).
2. S. A. Korff, Electron and Nuclear Counters (2nd ed.), Van Nostrand, New York (1955).
3. C. E. Crouthamel, Applied Gamma-Ray Spectrometry, Pergamon Press, Oxford (1960); 2nd ed. (1970).
4. S. M. Shafroth (Ed.), Scintillation Spectroscopy of Gamma Radiation, Vol. 1, Gordon and Breach Science Publishers (1967).
5. D. Aliaga-Kelly and D. R. Nicoll, Recent developments in scintillation detectors, Nucl. Instr. Meth.
43:110 (1966).