TANWAR, Pramila. Effectiveness of Audio–Video Material in Teaching-Learning Process at Secondary Stage. SCHOOL SCIENCE, [S. l.], v. 55, n. 4, p. p.36–40, 2017. Disponível em: http://ejournals.ncert.gov.in/index.php/SS/article/view/2608. Acesso em: 18 aug. 2025.