Magnetovariational Profiling Using Plotting of Polar Diagrams Levadnyy, V. T. ; Fedorov, A. N. ; Pavlova, I. V. ; Aksenova, L. V. ; Matkovskiy, Yu. I. Abstract Publication: Geomagnetism and Aeronomy Pub Date: July 1974 Bibcode: 1974Ge&Ae..13..962L