A.Muhammad, Z. . (2020). Determination the dispersion parameters and urbach tail of ZnO and ZnO:Co thin films prepared by The chemical Spray pyrolysis technique. مجلة المستنصرية للعلوم والتربية, 17(5), 21–30. استرجع في من https://edumag.uomustansiriyah.edu.iq/index.php/mjse/article/view/34