References
- Appleton, E. V., Proc. Roy. Soc., A162 (1937), 451. J. Atmos. Terr. Phy., 3 (1953), 282.
- Mazumdar, S. C., J. Inst. Telecom. Engrs., 4 (1958), 2, 81–86.
- Mitra, S. N. & Mazumdar, S. C., J. Atmos. Terr. Phy., 10 (1957), 32.
- C.R.P.L., Circular No. 462 (1948), National Bureau of Standards.
- Rawer, K., Wireless Engineer, 29 (1952), 287.