GOEL, R. K.; NAIR, N. G. K. The Spiti Ordovician-Silurian Succession. Journal of Geological Society of India, [S. l.], v. 18, n. 1, p. 47–48, 1977. Disponível em: https://geosocindia.com/index.php/jgsi/article/view/63764. Acesso em: 20 sep. 2024.