ArchiveVolume 4, Issue 1, March 2020
Takele Bekele Bayu
Pages: 1-8     Published Online: Feb. 7, 2020
DOI: 10.11648/j.jppa.20200401.11        Views 409      Downloads 169
Jan Betta
Pages: 9-15     Published Online: Mar. 10, 2020
DOI: 10.11648/j.jppa.20200401.12        Views 341      Downloads 129
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