Karim, Farhad Qadir, and Mariwan Hamakarim Ahmed. “Hamdi and Hemin in the Same Equivalent Balance Scale”. Halabja University Journal 5, no. 2 (June 30, 2020): 1–15. Accessed May 28, 2022. https://huj.uoh.edu.iq/index.php/HUJ/article/view/huj-10291.