“Effect of Polyurethane Resin Additives on the Impact Toughness of Epoxy Resin Reinforced With Woven Roving Glass”. Iraqi Journal of Physics 7, no. 10 (December 1, 2009): 51–56. Accessed May 15, 2024. https://ijp.uobaghdad.edu.iq/index.php/physics/article/view/879.