K. Ibrahim, Hassan., and Rusel D . Salem. 2012. “Optical Properties 0f Poly Vinyl Alcohol ( PVA) Doped With Ali Zarin Orange Azo Dye Thin Films Prepared by Cast Method”. Journal of Kufa-Physics 4 (1). https://journal.uokufa.edu.iq/index.php/jkp/article/view/7560.