References
- Radio Propagation Unit Technical Report No. 9 (1945), Holabird Signal Depot, U.S.A.
- “Ionospheric Radio Propagation”, U.S. Department of Commerce, National Bureau of Standards, Circular No. 462 (1948).
- Crichlow, W. Q., Smith, D. F., Morton, R. B. & Corliss, W. R., “World-wide radio noise levels expected in the frequency band from 10 kc./s. to 100 mc./s.”, U.S. Department of Commerce, Circular No. 557 (1951).
- C.C.I.R. Documents of the VIIIth Plenary Assembly, Vol. I (1957), p. 324.
- Ghosh, B. B. & Mitra, S. N., “Measurement of atmospheric noise”, J. Inst. Telecom. Engrs., 5 (1958), 1, 2–16.