Chadthorng, J. ., & Prasomruk, P. . (2018). Effects of the 333’s visual screening models in community for prevention of blindness from cataract: Loengnoktha district, Yasothon province. Thammasat University Hospital Journal Online, 3(3), 10–18. Retrieved from https://he02.tci-thaijo.org/index.php/TUHJ/article/view/240292