Polyong C. P, Sarapimpha N, Deekla C, Phukkarawek S, Thepthong B, Poldongnok P. (2019). Effects of Upper Musculoskeletal Disorder from School Bag Usage among Primary School Grade 4-6 Students for a School in Bangkok Metropolis. Journal of The Department of Medical Services, 44(4), 48–53. Retrieved from https://he02.tci-thaijo.org/index.php/JDMS/article/view/246687