KASIYO, C.; DENUGA, D.; MUKWAMBO, M. An Investigation and Intervention on Challenges Faced by Natural Science Teachers When Conducting Practical Work in Three Selected School of Zambezi Region in Namibia. American Scientific Research Journal for Engineering, Technology, and Sciences, [S. l.], v. 34, n. 1, p. 23–33, 2017. Disponível em: https://asrjetsjournal.org/index.php/American_Scientific_Journal/article/view/3090. Acesso em: 27 apr. 2024.