T. U. ZAMAN. EFFECTIVENESS OF PRE-LABS AT SECONDARY SCHOOL LEVEL CHEMISTRY LAB. Pakistan Journal of Science, [S. l.], v. 64, n. 1, 2022. DOI: 10.57041/pjs.v64i1.457. Disponível em: http://pjosr.com/index.php/pjs/article/view/457. Acesso em: 16 may. 2024.