[1]
ค่อมบุญ ป. . . and ภิรมจิตรผ่อง เ. . ., “A Development of Mathematics Problem Solving Skills Using Problem-Based Learning Plan for Prathom Suksa 2 Students in Schools under the Office of Ubon Ratchathani Primary Education Service Area 2 ”, ubonreseva, vol. 4, no. 2, pp. 23–30, Aug. 2021.