MEBRAHTU, G.; EJIGU, M. A. Are History Aspects Related to the Periodic Table Considered in Ethiopian Secondary School Chemistry Textbooks?. Substantia, [S. l.], v. 3, n. 2, p. 75–82, 2019. DOI: 10.13128/Substantia-572. Disponível em: https://riviste.fupress.net/index.php/subs/article/view/572. Acesso em: 27 apr. 2024.