ArchiveVolume 3, Issue 1, March 2017
An Shuting, Chen Yuxin, Dai Wanping
Pages: 1-6     Published Online: Apr. 14, 2017
DOI: 10.11648/j.ijsd.20170301.11        Views 1376      Downloads 82
Belayneh Debasu Kelkay, Zelalem Esubalew
Pages: 7-12     Published Online: Apr. 26, 2017
DOI: 10.11648/j.ijsd.20170301.12        Views 1501      Downloads 89
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