1. D. C. Miller, “Some Considerations in the Use of Pulse Height Analysis with X-Rays,” Norelco Reporter IV (2): 37, 1957. Philips Electronics, Inc., Mount Vernon, New York.
2. W. R. Kiley, “The Function and Application of Counters and the Pulse Height Analyzer,” Norelco Reporter VII (6): 143, 1960. Philips Electronic Instruments, Inc., Mount Vernon, New York.
3. K. F. J. Heinrich, “Pulse-Height Selection in X-Ray Fluorescence,” Advances in X-Ray Analysis, Vol. 4, University of Denver, Plenum Press, New York, 1961, p. 370.