SRIVASTAVA, S. K., S. K. BINDRA, and M. P. BHARDWAJ. “401 MHz Transistorised Radiosonde Transmitter”. MAUSAM 43, no. 1 (January 1, 1992): 87–90. Accessed November 23, 2024. http://103.215.208.102/index.php/MAUSAM/article/view/3322.