Esgair, Karim Khalifa. “Comparison Between Performance of Okra Waste and Wheat Bran for Removing Some Heavy Metals from Wastewater”. Al-Nahrain Journal for Engineering Sciences 21, no. 1 (February 10, 2018): 36–44. Accessed October 31, 2024. https://nahje.com/index.php/main/article/view/NJES21010036.