Survey on visual development status among 5 957 preschool children aged 3-6 years in public kindergartens in an urban district of Beijing
ZHUANG Lili, ZHAO Hongtai, CHEN Haihua, ZU Wei
Chinese Journal of School Doctor . 2026, (6): 433 -438,458 .  DOI: 10.20161/j.cnki.32-1199/R.20260091