Solar eclipse and the ionosphere 
/ A NATO advanced studies institute held in Lagonissi, Greece, 26 May - 4 June, 1969 
 - New York:   Plenum Press,   1970 
 - xiv, 309p. 
<br/><br/><label>Universal Decimal Class. No.: </label>523.78:551.510.53(082.2)  / L0