Ismail NN. Experimental study on Ion Exchange Rate of Calcium Hardness in Water softening process Using Strong Acid Resin DOWEX HCR S/S. NUCEJ [Internet]. 2017 Jan. 28 [cited 2024 Dec. 23];19(1):107-14. Available from: https://oldjournal.eng.nahrainuniv.edu.iq/index.php/main/article/view/50