GUPTA, B. R. D. “Geomagnetic Solar Quiet Day Variation Sq According to L T from the Night Time Datum at Indian Stations During 1958”. MAUSAM 17, no. 4 (October 3, 1966): 643–648. Accessed November 23, 2024. http://103.215.208.102/index.php/MAUSAM/article/view/5803.