Sonthikan ์Natthakan, Suwimon Tirakanant, and Kamontip Srihaset. 2023. “Construction of a Diagnostic Test for Mathematical Problem-Solving of Prathomsuksa 3 Students in Schools under Taling Chan District Office, Bangkok”. Interdisciplinary Academic and Research Journal 3 (1). Maha Sara Kham, TH.:313-24. https://doi.org/10.14456/iarj.2023.21.