YONGWU, Z.; CHONGCONG, zhang; JIAN, Z. The coordinated development of Beijing-Tianjing-Hebei urban research. Advances in Social Sciences Research Journal, [S. l.], v. 2, n. 12, 2015. DOI: 10.14738/assrj.212.1721. Disponível em: http://116.203.177.230/index.php/ASSRJ/article/view/1721. Acesso em: 22 nov. 2024.