ArchiveVolume 8, Issue 5, October 2020
Dawit Milkias, Gemechu Beri
Pages: 106-111     Published Online: Aug. 31, 2020
DOI: 10.11648/j.jps.20200805.11        Views 31      Downloads 20
Mulugeta Aytenew, Getahun Bore
Pages: 112-119     Published Online: Sep. 8, 2020
DOI: 10.11648/j.jps.20200805.12        Views 15      Downloads 19
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