资源型城市煤炭行业绿色营销模式及对策研究 ——以榆林市为例
李从容,张洁
Research on green marketing model and countermeasures of coal industry in resource-based cities ——Taking Yulin as an example
Li Congrong,Zhang Jie
煤炭经济研究 . 2018, (5): 75 -79 .