References
- ALFVÉN, H., 1956. The sun's general magnetic field. Tellus 8 pp. 10-12.
- ALLEN, C. W., is: Astrophysical quantities. The Athlone Press, London, pp. XI + 263.
- BAILEY, D. K., 1957. Disturbances in the lower ionosphere observed at VHF following the solar flare of 23 February 1956 with particular reference to auroral-zone absorption. J. Geophys. Res. 6z pp. 431–63.
- BLOCK, L., 1958. On the interplanetary gas and its magnetic field. Arkiv for Fysik 14 pp. 179–193.
- BLOCK, L., 1958.a: Cosmic ray orbits in interplanetary magnetic fields. Arkiv for Fysik 14 pp. 161–178.
- CHAPMAN, S., 1950. Corpuscular influences upon the upper atmosphere. J. Geophys. Res. 55 pp. 361–72.
- CHAPMAN, S., and LITTLE, C. G., 1957. The nondevia-five absorption of high-frequency radio waves in auroral latitudes. J. Atm. Terr. Phys. 10 pp. 20–31.
- EHMERT, A., and REVELLIO, K., 1957. Solare Ultrastrahlung und ionospharische D-schicht am 23. Februar 1956. Z. Geophys. 23 pp. 113–134.
- GALPERIN A., 1958: Report to the CSAGI conference in Moscow, August 1938.
- HULTQVIST, B., 1959. On lower ionosphere electron-detachment- and recombination coefficients obtained from measurements of nondeviative ionospheric absorption. Arkiv for Geofysik 3 pp. 97–110.
- HULTQVIST, B., AARONS, J., and ORTNER, J., 1959: Effects of the solar flares of 7 July 1958 observed at Kiruna Geophysical Observatory. Tellus II pp. 319–331.
- LITTLE, C. G., and LEINBACH, H., 1958. Some measure-ments of high-latitude ionospheric absorption using extra terrestrial radio waves. Proc. IRE 46 pp. 334–348.
- MARTYN, D. F., 1951. The theory of magnetic storms and auroras. Nature 167 pp. 92–94.
- MEREDITH, L. H., GOTTLIEB, M B., and VANALLEN, J. A., 1955: Direct detection of soft radiation above so kilo-meters in the auroral zone. Phys. Rev. 97 pp. 201–205.
- MITRA, A. P., JONES, R. E., 5954. Recombination in the lower ionosphere. J. Geophys. Res. 59 pp. 391–406.
- NICOLET, M., 1953. The collision frequency of electrons in the ionosphere. J. Atm. Terr. Phys. 3 pp. 200-211.
- RAWER, K., 1953. Die Ionosphiire. P. Nordhoff N.V., Groningen-Holland, pp. 189.
- SEGRE, E. (Ed.), 1953: Experimental nuclear physics. J. Wiley & Sons Inc., New York, Vol i, pp. IX + 789.
- SHAPLEY, A. H. and ROBERTS, W. O., 1957. The great solar regions of 9-24 February 1956 and their terrestrial effects. National Bureau of Standards, Report 3062.
- STöRMER, C., 1955. The polar aurora. Clarendon Press, Oxford, pp. XVII - 403.
- VANALLEN, J. A., 1955. Interpretation of soft radiation observed at high altitudes in northern latitudes. Phys. Rev. 99, 609-AI2.
- WAYNICK, A. H., 1957. The present state of knowledge concerning the lower ionosphere. Proc. IRE 45 pp. 741–749.
- WILD, J. P., ROBERTS, J. A., and MURRAY, J. D., 1954: Radio evidence of the ejection of very fast particles from the sun. Nature 173 PP- 532–534.