ArchiveVolume 3, Issue 2, April 2017
Zelalem Yekoye Alemayehu
Pages: 22-26     Published Online: Mar. 11, 2017
DOI: 10.11648/j.jher.20170302.11        Views 2282      Downloads 171
Mohamed Nabil Alama
Pages: 27-30     Published Online: Mar. 17, 2017
DOI: 10.11648/j.jher.20170302.12        Views 2343      Downloads 324
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