South African Journal of Education On-line version ISSN 2076-3433 Print version ISSN 0256-0100
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DEMIRBAş, Murat and ERTUğRUL, Nurcan.A study on preschoolers' conceptual perceptions of states of matter: a case study of Turkish students. S. Afr. j. educ. [online]. 2014, vol.34, n.3, pp.01-13.