Study on Concentration of some Heavy Metals in Nile Tilapia, Oreochromis niloticus and Cat Fish, Clarias gariepinus from Lake Manzala, Egypt. مجلة تاج المعرفة, [S. l.], v. 1, n. الثالث, 2025. Disponível em: https://histt.edu.ly/ojs/index.php/tajournal/article/view/77. Acesso em: 25 أكتوبر. 2025.