ISMAIL, Natheer Nori. Experimental study on Ion Exchange Rate of Calcium Hardness in Water softening process Using Strong Acid Resin DOWEX HCR S/S. Nahrain University College of Engineering Journal, [S. l.], v. 19, n. 1, p. 107–114, 2017. Disponível em: https://oldjournal.eng.nahrainuniv.edu.iq/index.php/main/article/view/50.. Acesso em: 23 dec. 2024.