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kassim humadi ekhlass, k. Al ahmady K, Z. Sulyman E. Improve mechanical and thermal properties For unsaturated polyester resin, add iron residue. BERJ [Internet]. 2024 Dec. 1 [cited 2025 Oct. 26];20(4):772-9. Available from: https://moss.uomosul.edu.iq/index.php/berj/article/view/37901