Leelawattanapanit J, Inprasitha N. THE DEVELOPMENT OF THAI LANGUAGE TEXTBOOK FOR GRADE 7 INTELLECTUALLY IMPAIRED STUDENTS. jg-mcukk [internet]. 2020 Dec. 30 [cited 2025 Dec. 11];7(4):191-200. available from: https://so02.tci-thaijo.org/index.php/jg-mcukk/article/view/242410