ArchiveVolume 8, Issue 4, July 2020
Bayisa Bussa, Kotola Feleke
Pages: 104-111     Published Online: Jul. 4, 2020
DOI: 10.11648/j.hss.20200804.11        Views 82      Downloads 56
Yue Wang, Yuan Zhao, Fuhui Song
Pages: 112-116     Published Online: Jul. 30, 2020
DOI: 10.11648/j.hss.20200804.12        Views 26      Downloads 46
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