[1]
บุ้งทอง ค. and ประทุมเวียง ช., “An Operational Development of the Mathematical Problem Solving Skills by Using Polya’s Problem Solving Process for Prathom Suksa Three Students of Ban Nawa School under Ubon Ratchathani Primary Educational Service Area Office 3”, ubonreseva, vol. 2, no. 2, pp. 9–26, Aug. 2021.