1. Investigation of VLF radio propagation in the ionosphere on the satellites Cosmos 142 and 259;Aksenov;Space Res.,1971
2. Alexander , P. D. Computation of ray paths for very low frequency radio waves propagating through the magnetospheric plasma Southhampton, England 1971
3. Barish , F. D. J. G. Roederer Conjugate intersects to selected geophysical stations, report Denver, Colo. 1969
4. Guidance of radio and hydromagnetic waves in the magnetosphere;Booker;J. Geophys. Res.,1962
5. Ariel 3 observations of the GBR (16 kHz) wavefield above the winter night-time ionosphere;Bullough;Space Res.,1971