CHANG, Xiaozhen. Research on the Defense System of Hulun Buir Ancient Border Trenches. Scientific Journal Of Humanities and Social Sciences, [S. l.], v. 7, n. 2, p. 70–75, 2025. DOI: 10.54691/yhzz3g71. Disponível em: https://bcpublication.org/index.php/SJOHSS/article/view/8095. Acesso em: 25 sep. 2025.