JIVALL, L.; SAANDAR, M. The National Reference MONREF97 in Mongolia and its developments. Mongolian Geoscientist, [S. l.], n. 49, p. 63, 2019. Disponível em: https://mongoliajol.info/index.php/MGS/article/view/1229. Acesso em: 21 jul. 2024.