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China Univ Min & Technol, Sch Econ & Management, Xuzhou 221116, Jiangsu, Peoples R China
Australian Natl Univ, Fenner Sch Environm & Soc, Canberra, ACT 2601, Australia China Univ Min & Technol, Sch Econ & Management, Xuzhou 221116, Jiangsu, Peoples R China