Department of Physics, Govt. New Science College Rewa (M. P.) India.
Department of Applied Sciences, Chandigarh Engineering College, Mohali Punjab India.
Dinesh Kumar Pathak, Archana Shukla, A.P. Mishra
Department of Physics, A. P. S. University, Rewa (M. P.) India.
Department of Physics, Barkatullah University, Bhopal India.
Periodic variations of the geomagnetic activity indices Ap and Kp