1. Production rates and electron densities in the lower ionosphere due to solar cosmic rays;Adams;J. Atmospheric Terrest. Phys.,1965
2. Middle latitude observations by riometer techniques, Radio Astronomical and Satellite Studies of the Atmosphere;Anastassiades;ed. J. Aarons,1963
3. Solar flare X-ray emission measurements;Conner;Space Research,1964
4. Variability of the solar X-ray spectrum below 15 A;Culhane;Space Research,1964
5. Multistation riometer observations of sudden ionospheric disturbances;Holt;Radio Astronomical and Satellite Studies of the Atmosphere,1963