1. Investigation of the presence of ionized hydrogen atom in the outer atmosphere using whistler dispersions;OUTSU;Proc. Res. Inst. Atmos. Nagoya Univ.,1959
2. Observed attenuation rates of e.l.f. radio waves;JEAN;J. Res. Nat. Bur. Stand.,1961
3. Methode barre-fluxmètre d'enregistrement des variations magnétiques rapides;SELZER;Annals I.G.Y., IV,1957
4. The very low frequency emissions generated in the earth's exosphere;GALLET;Proc. Inst. Radio Engrs., N.Y.,1959
5. Sub-audible geomagnetic fluctuations;DUFFUS;Nature,1958