RAO, P. S. ., N. . BHATTACHARYYA, and B. R. . RAO. “A Note on the Anomalous Tilt Preceding the Koyna Earthquake Of 10 December 1967”. MAUSAM, vol. 30, no. 2 & 3, Apr. 1979, pp. 313-6, doi:10.54302/mausam.v30i2.3035.