alhatemy, mougd hadi, and mohammed hamed mahboba. “Improvement of Retread Blends Composed of Natural Rubber(Nr) And Polybutadiene Rubber(Br)”. Al-Nahrain Journal for Engineering Sciences 11, no. 3 (March 6, 2008): 478–484. Accessed November 21, 2024. https://nahje.com/index.php/main/article/view/545.