1. Brandt, A. E. The use of machine factoring in multiple correlation.J. Amer. Stat. Assn., 1928,23, 291–295.
2. Brandt, A. E. Uses of the progressive digit method. Practical applications of the punched card method in colleges and universities. New York: Columbia University Press, 1935. Edited by G. W. Baehne.
3. Carver, H. C. Uses of the automatic multiplying punch. Practical applications of the punched card method in colleges and universities. New York: Columbia University Press, 1935. Edited by G. W. Baehne.
4. Dwyer, Paul S. The computation of moments with the use of cumulative totals.Ann. math. Statistics, 1938,9, 288–304.
5. Dwyer, Paul S. Summary of problems in the computation of statistical constants with sorting and tabulating machines. Proceedings of the Educational Research Forum, Endicott, N. Y., August, 1940 (I.B.M.) See especially p. 24, (Milliman method and I.B.M. improvement).