1. GRODSTEIN, G. W., X-ray Attenuation Coefficients from 10 keV to 100 MeV, National Bureau of Standards Circular 583, 1957; Mc Ginnies, R. T., supplement to Circular 583, 1959.
2. GROSJEAN, C. C., and BOSSAERT, W., Table of Absolute Detection Efficiencies of Cylindrical Scintillation Gamma-Ray Detectors, a publication of the Computing Laboratory of the University of Ghent, 1965.
3. Response Function of NaI(Tl) Scintillation Counters
4. MILLER, W. F., REYNOLDS, J., and SNOW, W. J., Argonne National Laboratory Report No. 5902, 1958.
5. Comparison of calculated and experimental scintillation crystal photofractions