ArchiveVolume 8, Issue 2, December 2019
John Karkazis
Pages: 25-39     Published Online: Dec. 27, 2019
DOI: 10.11648/j.jwer.20190802.11        Views 357      Downloads 86
Wakuma Dufera Tesgera
Pages: 40-48     Published Online: Dec. 30, 2019
DOI: 10.11648/j.jwer.20190802.12        Views 391      Downloads 109
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