A. alwahid abdulhameed , Kawther, Attiya H .G, and Ruwaidah S. Saeed. “Review Article: Comparison of Three Types of Polymers Delrin , Polyester and Nylon”. Journal of Madenat Alelem University College 16, no. 1 (May 1, 2024): 96-100. Accessed December 22, 2024. http://116.203.176.164/index.php/JMAUC/article/view/515.