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ArchiveVolume 2, Issue 5, October 2017
Ayalew Sida
Pages: 143-146     Published Online: Oct. 24, 2017
DOI: 10.11648/j.ijecs.20170205.11        Views 2668      Downloads 190
Ildikó-Csilla Takács
Pages: 147-157     Published Online: Oct. 31, 2017
DOI: 10.11648/j.ijecs.20170205.12        Views 2713      Downloads 477
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