PRAMANIK , S. K., and P. S. HARIHARAN. “Diurnal Magnetic Variations Near the Magnetic Equator”. MAUSAM 4, no. 4 (October 1, 1953): 353–358. Accessed May 27, 2024. https://mausamjournal.imd.gov.in/index.php/MAUSAM/article/view/4838.