Preface Vol.49. Mongolian Geoscientist, [S. l.], n. 49, p. 1, 2019. DOI: 10.5564/mgs.v0i49.1222. Disponível em: https://www.mongoliajol.info/index.php/MGS/article/view/1222. Acesso em: 13 jul. 2026.