Yuencheewit S, Poophayang P. THE PROBLEMS OF THE ADMINISTRATION OF EARLY CHILDHOOD EDUCATION IN SCHOOLS UNDER CHAIYAPHUM PRIMARY EDUCATION SERVICE AREA OFFICE 1. JMND [internet]. 2021 Jan. 20 [cited 2026 Aug. 29];8(1):33-44. available from: https://so03.tci-thaijo.org/index.php/JMND/article/view/249611