ArchiveVolume 4, Issue 2, June 2019
Yanxia Li, Zhuo Chen
Pages: 39-43     Published Online: Jun. 24, 2019
DOI: 10.11648/j.ellc.20190402.12        Views 198      Downloads 35
Lubomira Stefanova
Pages: 44-53     Published Online: Jul. 1, 2019
DOI: 10.11648/j.ellc.20190402.13        Views 196      Downloads 27
Ayele Eyob Kenta, Tesfaye Buche Bosha
Pages: 54-60     Published Online: Jul. 4, 2019
DOI: 10.11648/j.ellc.20190402.14        Views 204      Downloads 52
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