ArchiveVolume 4, Issue 2, June 2019
Kebede Lemu Bekelcha, Aregash Eticha Sefera
Pages: 32-40     Published Online: Sep. 23, 2019
DOI: 10.11648/j.allc.20190402.11        Views 99      Downloads 25
Xiaobing Hu
Pages: 41-47     Published Online: Oct. 10, 2019
DOI: 10.11648/j.allc.20190402.12        Views 76      Downloads 11
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