PITWELL, L. R. . A TEACHING AID FOR LABORATORY TECHNIQUES. The Ethiopian Journal of Education, [S. l.], v. 5, n. 1, p. 82–84, 2024. Disponível em: https://ejol.aau.edu.et/index.php/EJE/article/view/11031. Acesso em: 16 apr. 2025.