Thawachai Tajai และผู้แต่งคนอื่นๆ. (2016) 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. <i>RMUTL Engineering Journal</i>, <i>1</i>(2), 14-21.Thawachai Tajai และผู้แต่งคนอื่นๆ. "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 1 (2016):14-21.Thawachai Tajai และผู้แต่งคนอื่นๆ. 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. Rajamangala University of Technology Lanna:ม.ป.ท. 2016.