“Some Experiments on the Determination of the Structure and Refractive Index of the Lower Troposphere (lowest 200 Ft) over Dum Dum Airport, Calcutta”. MAUSAM 10, no. 3 (July 1, 1959): 295–312. Accessed December 29, 2025. https://mausamjournal.imd.gov.in/index.php/MAUSAM/article/view/4064.