Bulbul Jan and M. Ayub Khan Yousuf Zai 2021. Investigating the Influence of Cosmic Rays on Ozone Layer Depletion at Beijing, China. Journal of Basic & Applied Sciences. 8, 2 (Jul. 2021), 370–373. DOI:https://doi.org/10.6000/1927-5129.2012.08.02.20.