Kittipong Kongsomboon. (2001) Prevalence and comparison of risk factors to abnormalvisual acuity in early elementary school student ofWatbuangthonglang school and Srinakarinwirot PasarnmitDemonstration school. <i>Journal of Medicine and Health Sciences</i>, <i>7</i>(2), 62-69.Kittipong Kongsomboon. "Prevalence and comparison of risk factors to abnormalvisual acuity in early elementary school student ofWatbuangthonglang school and Srinakarinwirot PasarnmitDemonstration school". Journal of Medicine and Health Sciences 7 (2001):62-69.Kittipong Kongsomboon. Prevalence and comparison of risk factors to abnormalvisual acuity in early elementary school student ofWatbuangthonglang school and Srinakarinwirot PasarnmitDemonstration school. Faculty of Medicine,Srinakharinwirot University:ม.ป.ท. 2001.