Meng, C.I. & Akasofu, S.I. books & textbook
A STUDY OF POLAR MAGNETIC SUBSTORMS
J Geophysical Research /1969T Pamphlet
THE GEOMAGNETIC STORM OF APRIL 17-18, 1965
J Geophys Res /1967T Pamphlet
J Geophysical Research /1969T Pamphlet
J Geophys Res /1967T Pamphlet