KULSHRESTHA, S. M., and K. CHATTERJEE. “Radio-Climatology of India : II. Radio Refractive Index at 850-Mb Level”. MAUSAM 17, no. 4 (October 3, 1966): 545–558. Accessed September 19, 2024. http://103.215.208.102/index.php/MAUSAM/article/view/5755.