1. Special Issue on Sporadic E, Radio Sci 1(2) S. A. Bowhill 1966
2. Variations in Frequency of Occurrence of Sporadic E, 1949–1959
3. Ionospheric mapping by numerical methods;Jones;ITU Telecommun. J.,1960
4. Representation of diurnal and geographic variations of ionospheric data by numerical methods;Jones;ITU Telecomm. J.
5. Methods for applying numerical maps of ionospheric characteristics;Jones;J. Res. NBS, Radio Propagation,1962