बनवारी लाल शर्मा. दीपू . प्राथमिक शिक्षक, [S. l.], v. 36, n. 4, p. p.42–43, 2024. Disponível em: https://ejournals.ncert.gov.in/index.php/pp/article/view/534. Acesso em: 21 oct. 2025.