Bugoslavskaia, N. IA. Solar activity and the ionosphere, for radio communications specialists N. IA. Bugoslavskaia - Oxford Pergamon Press 1962 - xi+39p. figs ISBN: 80096417 Subjects--Topical Terms: AtmosphereIonosphereSolar Activity Universal Decimal Class. No.: 551.510.535.4:523.98 / BUG