Das, A.K., and S.L. Malurkar. “Kodaikanal Solar and Geomagnetic Data, April-June, 1952”. MAUSAM 3, no. 4 (October 1, 1952): 296–299. Accessed September 20, 2024. http://103.215.208.102/index.php/MAUSAM/article/view/4768.