Mohanad Qader Kareem, Suzan Abd-allah Hassan, and Maad Mohammed Ameen. “Doping Effect ((COCl2.6H2O) & (CuCl2.6H2O))(2%)w/V on Optical Energy Gap of (GA/PVA) Composite Films”. Tikrit Journal of Pure Science, vol. 20, no. 4, Feb. 2023, pp. 114-9, doi:10.25130/tjps.v20i4.1222.