ARORA , B. R., and B. P. SINGH. “Geomagnetic Field Precursors Associated With Earthquakes”. MAUSAM 30, no. 2 & 3 (April 1, 1979): 317–322. Accessed June 15, 2025. http://103.215.208.102/index.php/MAUSAM/article/view/3036.