Literature Characteristics and Hotspots of Coordinated Development of Beijing-Tianjin-Hebei ——Based on Bibliometric and Co-word Analysis
LI Hai-feng, XU Jian-min,LI Jun-kai
JOURNAL OF HEBEI UNIVERSITY (Philosophy and Social Science) . 2019, (1): 97 -107 .  DOI: 10.3969/j.issn.1005-6378.2019.01.014