ตาใจ ธ.; ณ ตะกั่วทุ่ง อ.; หัตถสิน ย. Development of the Pinpoint Material on Barcode Symbols with a Barcode Readable System for Northern School for the Blind under the Patronage of the Queen, Chiang Mai. RMUTL Engineering Journal, [S. l.], v. 1, n. 2, p. 14–21, 2016. DOI: 10.14456/rmutlengj.2016.13. Disponível em: https://ph01.tci-thaijo.org/index.php/RMUTLEngJ/article/view/183879. Acesso em: 29 aug. 2026.