QAIYUM, ABDUL. “A CROSS-SPECTRAL ANALYSIS BETWEEN SOLAR ACTIVITY, GEOMAGNETIC INDEX Aa, AND RAINFALL”. MAUSAM 56, no. 3 (July 1, 2005): 702–707. Accessed July 20, 2024. https://mausamjournal.imd.gov.in/index.php/MAUSAM/article/view/1003.