ArchiveVolume 7, Issue 2, June 2018
Solomon Derbie Gont, Mikias Hailu Kebede
Pages: 54-59     Published Online: Jun. 29, 2018
DOI: 10.11648/j.jenr.20180702.11        Views 1305      Downloads 88
Hossam Mohamed El Sersawy, Nadia Mohamed Abdel Salam Eshra, Mariam Gabr Salem Ali
Pages: 60-74     Published Online: Aug. 22, 2018
DOI: 10.11648/j.jenr.20180702.12        Views 1450      Downloads 60
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