Electric waves — Audiobooks
Signalling across space without wires being a description of the work of Hertz & his successors
by Sir Oliver Lodge
Waves and ripples in water, air, and æther : Being a course of Christmas lectures delivered at the Royal Institution of Great Britain
by Sir J. A. (John Ambrose) Fleming
Hertzian Wave Wireless Telegraphy
by Sir J. A. (John Ambrose) Fleming