สุนทรพรพันธ์ อ. The Study of Academic Administration Problems in Small Schools under Nakhon Sawan Primary Educational Service Area Office 1. edunsruj [internet]. 2021 Apr. 29 [cited 2026 Oct. 8];4(1):8-18. available from: https://so02.tci-thaijo.org/index.php/edunsrujo/article/view/253749