Khaleel, L.R. et al. 2022. Statistical Indicators for Evaluating the Effect of Heavy Metals on Samaraa Drug Industry Water Exposed to the Sun and Freezing: http://www.doi.org/10.26538/tjnpr/v6i12.12. Tropical Journal of Natural Product Research (TJNPR). 6, 12 (Dec. 2022), 1969–1974.