Waves and satellites in the near-Earth plasma by Al'pert, /IA. L. (/I

Communication systems design line-of-sight and tropo-scatter systems by Panter, Philip F.

Sun, earth and radio an introduction to the ionosphere and magnetosphere by Ratcliffe, J. A. (John Ashworth)

The velocity of light and radio waves. by Froome, K. D.

Ionosphere research at the Manila observatory by Hennessey,James J.

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Ultra high frequency propagation by Reed, Henry Rouse 1904-

Wave propagation in periodic structures; electric filters and crystal lattices. by Brillouin, Leon, 1889-

IEEE Antennas & propagation magazine.

Radio wave propagation characteristics in lossy circular waveguides such as tunnels, mine shafts, and boreholes. by Holloway, C.L

Laboratory models used in the investigation of radio wave propagation in irregular structures. by Bahar, E.