Zhu Jing
School of Management and Economics of Hebei University of Science and Technology, 050000, Hebei, China
Shi Jiazhuang
School of Management and Economics of Hebei University of Science and Technology, 050000, Hebei, China
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Zhu Jing and Shi Jiazhuang, 2013. Systematic Evaluation of Sustainable Development of Coal District Based upon Principal Component Analysis and Research on Countermeasures. Information Technology Journal, 12: 5119-5121.
DOI: 10.3923/itj.2013.5119.5121
URL: https://scialert.net/abstract/?doi=itj.2013.5119.5121
DOI: 10.3923/itj.2013.5119.5121
URL: https://scialert.net/abstract/?doi=itj.2013.5119.5121