alhatemy mougd hadi, mahboba mohammed hamed. Improvement of Retread Blends Composed of Natural Rubber(Nr) And Polybutadiene Rubber(Br). NUCEJ [Internet]. 2008 Mar. 6 [cited 2024 Dec. 23];11(3):478-84. Available from: https://oldjournal.eng.nahrainuniv.edu.iq/index.php/main/article/view/545