kurda, A. H. “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, vol. 13, no. 1, Jan. 2025, pp. 18-24, doi:10.25271/sjuoz.2025.13.1.1372.