472 BELL SYSTEM TECHNICAL JOURNAL 



10. W. R. Bennett, Cross-Modulation in Multichannel Amplifiers, Bell Sys. Tech. JL, 



Vol. 19, pp. 587-610; Oct. 1940. 



11. N. Wiener, Generalized Harmonic Analysis, Acta. Math., Vol. 55, pp. 177-258; 1930. 



12. S. O. Rice, Mathematical Analysis of Random Noise, Bell Sys. Tech. Jour., Vol. 24, 



p. 50; Jan. 1945. 



13. R. Courant and D. Hilbert, Methoden der Mathematischen Physik, Vol. 1, p. 64; 



Berlin, 1931. 



14. W. R. Bennett, New Results in the Calculation of Modulation Products, Bell Sys. 



Tech. Jour. Vol. 12, pp. 228-243; April 1933. 



15. G. A. Campbell, The Practical Application of the Fourier Integral, Bell Sys. Tech. 



Jour., Vol. 7, pp. 639-707; Oct. 1928. 



16. S. C. Kleene, Analysis of Lengthening of Modulated Repetitive Pulses, Froc. L R. E., 



Vol. 35, pp. 1049-1053; 1947. 



