Al-Huseini, H. A. M. (2017). IR and Uv-Visible Study of the Thermal Stabilization for pvc Stabilized with ( Ho,Tb and Dy ) Stearate and Synergistic Mixtures. Ibn AL-Haitham Journal For Pure and Applied Sciences, 19(4), 90-98 E. https://jih.uobaghdad.edu.iq/index.php/j/article/view/1675