Assim Ahmed Issa and Tamathir Abbas Hamoudi 2022. Theoretical Studies of the Optical Properties of ZnS , ZnO and CdS Nanopartical Using the Brus Equation. Tikrit Journal of Pure Science. 27, 3 (Nov. 2022), 15–18. DOI:https://doi.org/10.25130/tjps.v27i3.55.