BHALME, H. N., D. A. MOOLEY, and S. K. JADHAV. “Large-Scale April Pressure Index Connected With the Southern Oscillation and Its Potential for Prediction of Large-Scale Droughts over India”. MAUSAM, vol. 35, no. 3, July 1984, pp. 355-60, doi:10.54302/mausam.v35i3.2205.