Study on Concentration of some Heavy Metals in Nile Tilapia, Oreochromis niloticus and Cat Fish, Clarias gariepinus from Lake Manzala, Egypt. jkc [Internet]. 2025 Sep. 16 [cited 2026 Jun. 24];2(2). Available from: https://histt.edu.ly/ojs/index.php/tajournal/article/view/77