1. Cosmical Electrodynamics;ALFVÉN,1950
2. Magnetohydrodynamics;COWLING,1957
3. Cosmic Electrodynamics;DUNGEY,1958
4. The Sun,1953
5. LEHNERT, B. (ed.) (1958). Electromagnetic Phenomena in cosmical Physics, Symposium 6 of the International Astronomical Union, Cambridge University Press. The ionosphere is discussed in