Nulay, Pradit, Sitthiporn Soonthorn, Rungsun Injun, and Watcharin Sutthisai. 2022. “Factors affecting on strategic Implementation of the Department of Mineral Resources, Office of Mineral Resources Regions 1-4”. Journal of Modern Learning Development 7 (8):109-33. https://so06.tci-thaijo.org/index.php/jomld/article/view/256839.