SINHA, M. C., V. S. TIWARI, R. N. GUPTA, and B. R. ARORA. “Sea Level Isobaric Analysis by the Method of Optimum Interpolation”. MAUSAM, vol. 33, no. 1, Jan. 1982, pp. 81-84, doi:10.54302/mausam.v33i1.2707.