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ArchiveVolume 3, Issue 2, June 2018
Chang Shan, Li Wenfeng, Li Dajuan
Pages: 12-17     Published Online: Aug. 31, 2018
DOI: 10.11648/j.ajere.20180302.11        Views 1341      Downloads 181
Zhao Xiuyan, Zhou Pengchao, Yang Yongfang
Pages: 18-30     Published Online: Oct. 12, 2018
DOI: 10.11648/j.ajere.20180302.12        Views 1222      Downloads 187
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