LAVALESH PRATAP SINGH; ADYA SHAKTI RAI. Visually Challenged Students’ Proficiency in the Use of Abacus. JOURNAL OF INDIAN EDUCATION, [S. l.], v. 40, n. 2, p. p.91–98, 2024. Disponível em: http://45.127.197.188:8090/index.php/jie/article/view/1656. Acesso em: 9 jan. 2025.