Institution: | 1. Institute of Experimental Meteorology, Obninsk, U.S.S.R.;2. Cosmic Physics Department, S. I. Subbotin Institute of Geophysics, Ukranian Academy of Sciences, Kiev, U.S.S.R.;3. Physics Department, Kiev State University, Kiev, USSR;4. Radiophysical Department, Polytechnical Institute, LeningradU.S.S.R.;5. Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation, USSR Academy of Sciences, MoscowU.S.S.R. |