Waves /
Richards, J. P. G.
Waves / J. P. G. Richards - Harmondsworth : Penguin Books, 1972 - 192 p. ; 21 cm.
Includes index
Electromagnetic waves--Transmission
Waves / J. P. G. Richards - Harmondsworth : Penguin Books, 1972 - 192 p. ; 21 cm.
Includes index
Electromagnetic waves--Transmission
