1. Electrodynamics of the outer atmosphere;Dungey,1954
2. Electrodynamics of the outer atmosphere;Dungey,1955
3. Outer atmospheric oscillation and geomagnetic micropulsation;Kato,1956
4. Further study on the cause of giant pulsations;Kato,1956
5. Studies on geomagnetic micropulsations, Pc.;Kato,1957