1. Wilson, C. T. R., "Some thundercloud problems," J. Franklin Inst., Vol. 208, 1916.
2. Watson, R. A. and J. Craib, "The electric field of South African thunderstorms," Proc. R. Soc., Ser. A, Vol. 114, 229-243, 1920.
3. Appleton, E. V., R. A. Watson-Watt, and J. F. Herd, "On the nature of the atmosphere," Proc. Roy. Soc., Vol. A 111, 654, 1926.
4. Israel, H., Atmospheric Electricity, Israel Program for Scientific Translations, Vol. 2, Jerusalem, 1973.
5. Holzworth, R. H. and Y. T. Chiu, "Spherics in the stratosphere," CRC Handbook of Atmospherics, Volume one, H. Volland, CRC Press, Boca Raton, Florida, 65, 1982.
6. Uman, M. A., Lightning, McGraw-Hill, New York, 1969.
7. Gish, O. H., "Evaluation and interpolation of the columnar resistance of the atmosphere," Terr. Magn. Atmos. Electr., Vol. 99, 159-168.
8. Golde, R. H., Lighting, Vol. I, Academic Press, 1977.
9. Volland, H., Atmospheric Electrodynamics Chemistry in Space, Vol. II, Springer-Verlag, Berlin, Germany, 1984.
10. Tarnure, Y., "An analysis of the electric field after lightning discharges," Geophys. Res. Pap., Vol. 41, 190-200, 1955.
11. Kasemir, H. W., "The thunderstorm as a generator in the global electric circuit (in German)," Z. Geophys., Vol. 25, 33, 1959.
12. Anderson, F. G. and G. D. Freier, "Interaction of the thunderstorm with a conducting atmosphere," J. Gwphys. Res., Vol. 74, 5390, 1969.
13. Illingworth, A. J., "Electric field recovery after lightning as the response of a conducting atmosphere to a field change," Quart. J. Roy. Metwml. Soc., Vol. 98, 604, 1972.
14. Park, C. G. and M. Dejnakarintra, "Penetration of thundercloud electric fields into the ionosphere and magnetosphere 1, Middle and subauroral latitudes," J. Geophys. Res., Vol. 78, 6623-6633, 1973.
15. Greifinger, C and P. Greifinger, "Transient ULF electric and magnetic fields following a lightning discharge," J. Geophys. Res., Vol. 81, 2237, 1976.
16. Nisbet, J. S., "A dynamic model of thundercloud electric fields," J. Atmos. Sci., Vol. 40, 2855, 1983.
17. Baginski, M. E., L. C. Hale, and J. J. Olivero, "Lightning-related fields in the ionosphere," Geophysical Res. Let., Vol. 15, No. 8, 764-767, August 1988.
18. Hale, L. C. and M. E. Baginski, "Current to the ionosphere following a lightning stroke," Nature, Vol. 329, No. 6142, 814-816, Oct. 29, 1987.
19. Sunde, E. D., Earth Conduction Eflects in Transmission Systems, Dover, New York, 1968.
20. Baum, C. E., "Simulation of electromagnetic aspects of lightning," Proc. of Lightning Tech., NASA Conf. Pub. 2128, April 1980.
21. Baginski, M. E., "Finite element simulation of the atmosphere's electromagnetic response to charge perturbations associated with lightning,", Ph.D. thesis, The Pennsylvania State University, 111, 1987.
22. Stratton, J. A., Electromagnetic Theory, McGraw-Hill, New York, 1941.
23. Holzworth, R. H., M. C. Kelly, C. L. Siefring, L. C. Hale, and J. D. Mitchell, "Electrical measurements in the atmosphere and ionosphere over an active thunderstorm: 2. Electric field and conductivity," J. Geophys. Res., Vol. 90, 9824-9830, 1985.
24. Hale, L. C., "Middle atmosphere electrical structure, dynamics, and coupling," Adv. Space Res., Vol. 4, 175-186, 1984.
25. Markson, R. and L. C. Hale, "Electrical measurements in the atmosphere and ionosphere over an active thunderstorm,", presented at AGU Meeting, Philadelphia, Pennsylvania, 1982.
26. Berkey, G. A. and W. J. Karplus, Hybrid Computation, Volume one, Wiley, 1968.
27. Malan, D, J., "The distribution of electricity in thunderclouds," Proc. R. Soc., Ser. A., Vol. 209, 177, 1958.
28. I.M.S.L. TWODEPEP., 5th Ed., Dallas Texas, 1985.
