“Building Robust Control Limits for the Mean and Range to Control the Quality of Drinking Water Case of Skewed Distributions”. Journal of Al-Rafidain University College For Sciences ( Print ISSN: 1681-6870 ,Online ISSN: 2790-2293 ) 52, no. 2 (December 31, 2022): 125–137. Accessed April 16, 2026. https://jrucs.iq/index.php/JAUCS/article/view/547.