Preepremmote P, Thongnopkun P, Roubroumlert W, Madlee D, Pamounsub A, Tengsuwan P. Value-Added Creation to Enhance the Income of Gem and Jewelry Businesses in Chanthaburi. Nida Bus J [internet]. 2022 Dec. 13 [cited 2025 Apr. 28];(30):123-41. available from: https://so10.tci-thaijo.org/index.php/NIDABJ/article/view/72