เมฆรา ณ. . “MEASURES FOR PROMOTING COMMUNITY PRODUCTS AND IMPROVING ITS ECONOMIC VALUE : THE CASE STUDY OF GEOGRAPHICAL INDICATION REGISTRATION FOR ROCK SALT IN BAN DUNG DISTRICT, UDON THANI PROVINCE”. Journal of Humanities, Social Sciences, and Arts, vol. 3, no. 2, Feb. 2023, pp. 61-74, https://so03.tci-thaijo.org/index.php/hsa/article/view/266282.