Z.H., Dr, Prof. RAE. “Pollution of Natural Ecosystems, the Biosphere Radionuklidamy, and Its Implications”. International Journal of Contemporary Research and Review 10, no. 03 (March 31, 2019): 20332-20338. Accessed April 22, 2019. http://ijcrr.info/index.php/ijcrr/article/view/687.