kurda, Ahmed Hassan. “A SPECTROSCOPIC IN-VITRO METHOD FOR DETERMINING THE SUN PRODUCTION FACTOR (SPF)AND PHYSICAL PROPERTIES OF MARKETED SUNSCREEN FORMULATIONS”. Science Journal of University of Zakho 13, no. 1 (January 5, 2025): 18–24. Accessed February 5, 2025. https://sjuoz.uoz.edu.krd/index.php/sjuoz/article/view/1372.