1. Ratcliffe, J. A. (ed.): Fifty years of the ionosphere. J. Atmos. Terres. Phys. 36, 2069 (1974)
2. Ratcliffe, J. A. (ed.): Physics of the upper atmosphere. New York: Academic Press 1960
3. Ratcliffe, J. A.: An introduction to the ionosphere and magnetosphere. Cambridge: Cambridge Univ. Press 1972
4. McEwan, M. J., Phillips, L. F.: Chemistry of the atmosphere. London: Edward Arnold 1975
5. Banks, P. M., Kockards, G.: Aeronomy. New York: Academic Press 1973