MANI, A. .; HUDDAR, B. B. .; KACHARE, N. R. .; SWAMINATHAN, M. S. .; SRIVASTAVA , G. P. .; VENKITESHWARAN, S. P. . Seasonal Variation of Potential Gradient in the Free Atmosphere at Poona During the I.G.Y. MAUSAM 1960, 11, 285-294.