KUMAR, Ajit. An appraisal of ladder symbolism with special reference to rock-art. Boletín APAR, [S. l.], v. 5, n. 17-18, p. pp. 813–820, 2013. DOI: 10.70748/ba.17-18.2013.294. Disponível em: https://revistas.coarpe.org.pe/index.php/BoletinApar/article/view/294. Acesso em: 17 ago. 2026.