Jantharaphan N, Phengsawat W, Chalakbang W. Characteristic Factors of School Administrators in the 21st Century Affecting Administration Effectiveness of the Educational Opportunity Expansion Schools in Nakhon Phanom Province. J Roi Et [internet]. 2022 Dec. 31 [cited 2026 Sep. 11];16(3):123-37. available from: https://so03.tci-thaijo.org/index.php/reru/article/view/253997