Study water quality of the Tigris and the Euphrates River with the progress of time. Journal of the College of Basic Education, [S. l.], v. 20, n. 84, p. 931 – 939, 2022. DOI: 10.35950/cbej.v20i84.8457. Disponível em: https://cbej.uomustansiriyah.edu.iq/index.php/cbej/article/view/8457.. Acesso em: 4 jun. 2026.