GUPTA, S. S. . (1971) “EXCEPTIONALLY HEAVY RAINS IN AND AROUND PATNA CITY IN SEPTEMBER 1967 : A CASE STUDY OF ID-TROPOSPHERIC INTERACTION BETWEEN AN EASTERLY WAVE AD A WESTERLY WAVE ”, MAUSAM, 22(4), pp. 599–600. doi: 10.54302/mausam.v22i4.5024.