RAO, K. S. R. ., R. A. . DUBEY, and S. R. . PATIL. “Possible Linkage Between Solar and Geomagnetic Activity and Upper Atmospheric Phenomena”. MAUSAM, vol. 29, no. 4, Oct. 1978, pp. 671-4, doi:10.54302/mausam.v29i4.2945.