Radio -- United States -- Encyclopedias : The concise encyclopedia of American radio / Christopher H. Sterling, editor ; Cary O'Dell, assistant editor ; Michael C. Keith, consulting editor
Radio Venceremos (El Salvador) -- History. / http://id.loc.gov/authorities/names/n86106350 http://id.loc.gov/authorities/subjects/sh99005024 : Broadcasting the civil war in El Salvador : a memoir of guerrilla radio / by Carlos Henríquez Consalvi ("Santiago") ; translated by Charles Leo Nagle V with A.L. (Bill) Prince ; introduction by Erik Ching
Electromagnetic waves with frequencies between about 3 kilohertz (very low frequency - VLF) and 300,000 megahertz (extremely high frequency - EHF). They are used in television and radio broadcasting, land and satellite communications systems, radionavigation, radiolocation, and DIATHERMY. The highest frequency radio waves are MICROWAVES
Radio waves -- Industrial applications -- Congresses. : Microwave and radio frequency applications : proceedings of the Third World Congress on Microwave and Radio Frequency Applications : "Bridging Science, Technology, and Applications" / edited by Diane C. Folz [and others]