GUPTA, V. J. Silurian-Devonian Boundary in the Indian Subcontinent. Journal of Geological Society of India, [S. l.], v. 12, n. 3, p. 274–279, 1971. Disponível em: https://geosocindia.com/index.php/jgsi/article/view/61518. Acesso em: 20 sep. 2024.