1. Comparison of Russian and British electron density distributions derived from the same v.l.f. and l.f. propagation data;BAIN;J. Atmos. Terr. Physics,1969
2. Z-region electron density distributions from propagation data;BAIN;Proc. IEE (London),1967
3. Collision frequencies and energy transfer ions;BANKS;Planet. Space Sci.,1966
4. Present knowledge of the lowest ionosphere;BELROSE,1964
5. BELROSE, J. S., I. A. BOURNE, and L. W. HEWITT (1966) The winter variability of electron number density in the lower ionosphere over Ottawa, in Electron Density Profiles in Ionosphere and Exosphere (ed. J. Frihagen), pp. 48–60.