Bulbul Jan, and M. Ayub Khan Yousuf Zai. “Investigating the Influence of Cosmic Rays on Ozone Layer Depletion at Beijing, China”. Journal of Basic & Applied Sciences 8, no. 2 (July 2, 2021): 370–373. Accessed December 23, 2024. http://set-publisher.com/index.php/jbas/article/view/736.