ค้าเจริญ ร, ฉายายนต์ พ, จำรัสพันธุ์ อ. A COMPETENCY MODEL FOR LEARNING AREA HEADS AFFECTING LEARNING ACHIEVEMENT OF LEARNERS FOR PRIMARY SCHOOLS IN THE NORTH EASTERN REGION. spurhs [Internet]. 2018 Oct. 17 [cited 2024 May 17];18(2):112-2. Available from: https://so05.tci-thaijo.org/index.php/spurhs/article/view/151041