Juntaraprasert A, Roadrangka V, Noomhorm C. The Concept of Elementary Science Teachers on Matter and Properties of Matter. kasetsart J. Soc. Sci. [internet]. 2008 Dec. 31 [cited 2026 Sep. 11];29(3):216-27. available from: https://so04.tci-thaijo.org/index.php/kjss/article/view/246470