عبد العزيز دبدوب م. Using Three Statistical Analyses for Studying the Total Water Hardness of Tigris River in Mosul Town. IQJOSS [Internet]. 2012 Dec. 1 [cited 2025 Sep. 10];12(2):66-81. Available from: https://edusj.uomosul.edu.iq/index.php/stats/article/view/29431