ArchiveVolume 8, Issue 1, June 2019
Ayana Anteneh Astatike, Ermias Ganamo Gazuma
Pages: 8-16     Published Online: Jun. 12, 2019
DOI: 10.11648/j.jwer.20190801.12        Views 523      Downloads 137
Abraham Kidane Tesfaye
Pages: 17-24     Published Online: Jun. 12, 2019
DOI: 10.11648/j.jwer.20190801.13        Views 535      Downloads 114
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