SINHA, M. C., V. S. TIWARI, R. N. GUPTA, and B. R. ARORA. “Sea Level Isobaric Analysis by the Method of Optimum Interpolation”. MAUSAM 33, no. 1 (January 1, 1982): 81–84. Accessed November 18, 2025. https://mausamjournal.imd.gov.in/index.php/MAUSAM/article/view/2707.