1388 THE BELL SYSTEM TECHNICAL JOURNAL, NOVEMBER 1957 



5. Hamming, op. cit., Section 1. 



6. M. J. E. Golajs Notes on Digital Coding, Proc. I.R.E., 37, p. 657, June, 1949. 



7. W. Keister, A. E. Ritchie, and S. H. Washburn, The Design of SivUching Cir- 



cuits, D. Van Nostrand Co., Inc., New York, 1951, p. 316. 



8. M. J. E. Golav, Binary Coding, 1954 Svmi)osium on Information Theory, 



Trans. I.R.E., PGIT-4, p. 23-28, Sept.,'l954. 



9. G. H. Hard}- and E. AI. Wright, An Introduction to the Theory oj Numbers, 



Oxford University Press, O.xford, 1954, p. 51, Theorem 57. 



10. I. S. Reed, A Class of Multiple-Error-Correcting Codes and the Decoding 



Scheme, 1954 Symposium on Information Theory, Tran.s. I.R.E., PGIT-4, 

 p. 38-49, Sept., "1954. 



11. Hamming, op. cit., Section 7. 



12. D. Slepian, A Note on Two Binary Signaling Alphabets, Trans. I.R.E., IT-2, 



p. 84-86, June, 1956. 



13. P. Elias, Error Free Coding, 1954 Symposium on Information Theory, Trans. 



I.R.E., PGIT.4, p. 29-38, Sept., 1954. 



14. V. I. Siforov, On Noise Stability of a System with Error-Correcting Codes, 



Trans. I.R.E., IT-2, p. 109-115, Dec, 1956. See Table II, Column 8. 



