On the Legal Machanism of Cooperative Promotion of Environmental Protection Industry in Beijing-Tianjin-Hebei Region
MENG Qing-yu,LIANG Feng,ZHANG Si-yin
JOURNAL OF HEBEI UNIVERSITY (Philosophy and Social Science) . 2019, (2): 50 -56 .  DOI: 10.3969/j.issn.1005-6378.2019.02.008