“Study the of Effect of Micro and NanoCadmium Oxide on the Hardness Test of (epoxy-Polyurethane) Blend”. Iraqi Journal of Science 59, no. 4B (November 28, 2018): 2020–2025. Accessed December 19, 2024. https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/495.