Abdulrazak N., Zainab. “Sorption of Nitrate Salts from Wastewater Without and With Modification Orange Peel”. Iraqi Journal of Chemical and Petroleum Engineering 17, no. 3 (March 31, 2018): 109-116. Accessed November 27, 2019. http://ijcpe.uobaghdad.edu.iq/index.php/ijcpe/article/view/218.