Heights of ionized regions.
A novel modification of the older theoretical explanations of ionization processes in the ionosphere.
Kellogg, William W., Heights of ionized regions.. Santa Monica, CA: RAND Corporation, 1949. https://www.rand.org/pubs/papers/P62.html. Also available in print form.
Kellogg, William W., Heights of ionized regions., Santa Monica, Calif.: RAND Corporation, P-62, 1949. As of August 03, 2022: https://www.rand.org/pubs/papers/P62.html