เทศคลัง ก. STRATEGIC MANAGEMENT GUIDELINES TO ENHANCE RESOURCE MANAGEMENT IN SMALL-SIZED SCHOOLS UNDER THE UTTARADIT PRIMARY EDUCATIONAL SERVICE AREA OFFICE 1 . JEDU [internet]. 2026 May 5 [cited 2026 Sep. 24];1(1):19-31. available from: https://so17.tci-thaijo.org/index.php/JEDU/article/view/2078