RAPPRICH, V.; HERNÁNDEZ, W.; ERBAN, V. Geology of the Metapán volcanic field NW El Salvador. Revista geológica de América central, [S. l.], v. 33, 2006. DOI: 10.15517/rgac.v0i33.4236. Disponível em: https://www.revistas.ucr.ac.cr/index.php/geologica/article/view/4236. Acesso em: 17 jun. 2024.