1. Ionospheric mapping by numerical methods;Jones;Telecomm. J.,1960
2. Ionospheric mapping by numerical methods;Jones;Telecomm. J.,1962
3. Ionospheric mapping by numerical methods;Jones;Telecomm. J.,1965
4. Comité Consultatif International des Radiocommunications (C.C.I.R., Genève),1967
5. Propagation of decameter waves (h.f.band);Rawer,1963