“Lunar Tidal Oscillations in Horizontal Magnetic Intensity at Kodaikanal During Periods of Low and High Sunspots”. MAUSAM 20, no. 3 (July 1, 1969): 235–246. Accessed December 22, 2025. https://mausamjournal.imd.gov.in/index.php/MAUSAM/article/view/5452.