1. Freeman, H. A., Friedman, M., Mosteller, F., and Wallis, W. A.,Sampling Inspection, McGraw-Hill, New York, 1948.
2. Eisenhart, C., Hastay, M. W., and Wallis, W. A.,Selected Techniques of Statistical Analysis, McGraw-Hill, New York, 1947. Chapter 1.
3. Mandel, L., “Grading with a gauge subject to random output fluctuations,”Journal of the Royal Satistical Society, Series B, 16 (1954), 118–130.