alhatemy, mougd and mahboba, mohammed (2008) “Improvement of Retread Blends Composed of Natural Rubber(Nr) And Polybutadiene Rubber(Br)”, Al-Nahrain Journal for Engineering Sciences, 11(3), pp. 478-484. Available at: https://nahje.com/index.php/main/article/view/545 (Accessed: 25March2019).