626 THE «ELL SYSTEM TECHNICAL JOUKNAL, MAY 1957 



11. Summary Technical Report of the Committee on Propagation, National De- 



fense Research Committee. Volume 1, Historical and Technical survey. 

 Volume 2, Wave Propagation Kxperiments. Volume 3, Propagation of 

 Radio Waves. Stephen S. Attwood, editor, Washington, D.C., 1946. 



12. C. W. Burrows and M. C. Grav, The Effect of the Earth's Curvature on Ground 



Wave Propagation, Proc. I.R.E., 29, pp. 16-24, Jan., 1941. 



13. K. Bullington Characteristics of Bevoiid-Horizon Radio Transmission, Proc. 



I.R.E., 43, J). 1175; Oct., 1955. 



14. W. E. Cordon, Radio Scattering in The Troposphere, Proc. I.R.E., 43, p. 23, 



Jan., 1955. 



15. K. Bullington, Radio Transmission Beyond the Horizon in the 40- to 4,000 



MC Band, Proc. I.R.E., 41, pp. 132-1.35, Jan., 1953. 



16. K. A. Norton, P. L. Rice and L. E. Vogler, The Use of Angular Distance in 



Estimating Transmission Loss and Fading Range for Propagation Through 

 a Tur])ulent Atmosphere Over Irregular Terrain, Proc. I.R.E., 43, pp. 1488- 

 1526, Oct., 1955. 



17. F. H. Dickson, J. J. Egli, J. W. Herbstreit, and G. S. Wickizer, Large Reduc- 



tions of VHF Transmission Loss and Fading by Presence of Mountain Ob- 

 stacle in Beyond Line-Of-Sight Paths, Proc. I.R.E., 41, pp. 967-9, Aug., 

 1953. 



18. K. Bullington, W. J. Inkster and A. L. Durkee, Results of Propagation Tests 



at 505 MC and 4090 MC on Beyond-Horizon Paths, Proc. I.R.E., 43, pp. 

 1306-1316, Oct., 1955. 



19. Same as 13. 



20. H. G. Booker and J. T. deBettencourt, Theorj^ of Radio Transmission by 



Tropospheric Scattering Using Very Narrow Beams, Proc. I.R.E., 43, 

 pp. 281-290, March, 1955. 



21. W. H. Tidd, Demonstration of Bandwidth Capabilities of Bevond-Horizon 



Tropospheric Radio Propagation, Proc. I.R.E., 43, pp. 1297-1299, October, 

 1955. 



22. K. Bullington, Radio Propagation Variations at VHF and UHF, Proc. I.R.E., 



38, pp. 27-32, Jan., 1950. 



23. W. R. Young, Comparison of Mobile Radio Transmission at 150, 450, 900 and 



3700 MC, B.S.T.J., 31, pp. 1068-1085, Nov., 1952. 



24. K. A. Norton, The Physical Reality of Space and Surface Waves in the Radia- 



tion Field of RadioAntennas, Proc. I.R.E., 25, i)p. 1192-1202, Sept., 19.37. 



25. Same as 2. 



26. C. R. Burrows, Radio Propagation Over Plane Earth-Field Strength Curves, 



B.S.T.J., 16, pp. 45-75, Jan., 19.37. 



27. K. A. Norton, The Propagation of Radio Waves Over the Surface of the Earth 



and in the Upper Atmosphere, Part II, Proc. I.R.E., 25, pp. 1203-1236, 

 Sept., 1937. 



28. Same as 26. 



29. National Bureau of Standards Circular 462, Ionospheric Radio Propagation, 



Superintendent of Documents, U.S. Govt. Printing Office, Washington 25, 

 D.C. 



30. National Bureau of Standards, CRPL Series D, Basic Radio Propagation 



Predictions, issued monthly by LT.S. Govt. Printing Office. 



31. National Bureau of Standards Circular 465, Instructions for Use of "Basic 



Radio Propagation Predictions, Superintendent of Documents, U.S. Govt. 

 Printing Office, Washington, D.C. 



32. E. W. Allen, Very-High Frequency and Ultra-High Frequency Signal Ranges 



as Limited by Noise and Co-channel Interference, Proc. I.R.E., 35, pp. 

 128-136, Feb.; 1947. 



33. D. K. Bailey, R. Bateman and R. C. Kirby, Radio Transmission at VHF by 



Scattering and Other Processes in the Lower Ionosphere, Proc. I.R.E., 43, 

 pp. 1181-1230, Oct., 1955. 



34. J. W. Herbstreit, Advances in Electronics, 1, Academic Press, Inc., ]>p. 347- 



380, 1948. 



