Smail, Harem Othman, Evan Mustafa Ismael, and Sayran Anwer Ali. “Prevalence of Color Blindness Among Students of Four Basic Schools in Koya City”. Advances in BioScience 10, no. 2 (April 11, 2019): 31–34. Accessed September 5, 2026. https://sosjournals.org/ab/article/view/264.