1. C.A. Parry, Chairman; D.P. Worthington, G. Brunette, R.C. Kirby, R. Kulinyi, O.G. Villard, W.R. Vincent and W.L. Hatton, Panelists on: “The Present Status and Future Utilization of Advanced Technology in High Frequency Systems Engineering”. 1966 IEEE International Convention, March 1966.
2. The Editor, “The Characterization of transmission channels”, IEE Trans. on Communication Systems, vol. CS-11, September 1963, pp 259–260.
3. W.L. Hatton, “Oblique-sounding and HF radio communication”, IRE Trans. on Communication Systems, Vol. CS-9, September 1961, pp 275–279.
4. P.A. Bello, “Characterization of randomly time-variant linear channels”, IEEE Trans. on Communication Systems, vol. CS-11, December 1963, pp 360–393.
5. D.L. Lucas and J.D. Harpei, Jr., “A numerical representation of CCIR Report 322 High frequency (3–30 Mc/s) atmosphere radio noise data”. NBS Technical Note 318, August 1965.