Conference on M. F. , L. F. and V. L. F. radio propagation : 8th - 10th November, 1967 / Institutionof electrical engineers Institutionof electrical engineers Institution of Electrical Engineers. Electronics Division. Microelectronics Congresses. Integrated circuits Congresses. TK7874 .C65 1967 621.3 CON Includes bibliographies. London : Institution of Electrical Engineers, 1967 1967 1967 Text 695 p. : eng IEE conference publication no. 30