References
- Vikramsingh, R., Rao, M. N. & Uda, S., “Diurnal variation of hourly median field strength of 1940 mc./sec. signal in the foothills of Central Himalayas”, J. Inst. Telecom. Engrs., 4 (1958), 3, 147–56.
- Kerr, D. E., Propagation, of Short Radio Waves (McGraw-Hill Book Co. Inc., New York), 1951, pp. 112–22, 401, 411, 434 and 125.