磷化工企业技术创新效率评价——基于27家上市公司的数据
闫华飞,肖静,冯兵
Evaluation of technological innovation efficiency of phosphorus chemical enterprises:Based on the data of 27 listed companies
Yan Huafei,Xiao Jing,Feng Bing
无机盐工业
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2020, (9): 9
-14
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DOI: 10.11962/1006-4990.2019-0551