Nafi Aziz, Hana, and هناء. “Determine the Concentration of K40 Potassium in Tea Samples Using Sodium Iodide Reagent”. Journal of Education and Science (JES) 28, no. 1 (March 1, 2019): 121–131. Accessed August 4, 2025. https://rjps.uomosul.edu.iq/index.php/edusj/article/view/17457.