Volume 6, Issue 6, December 2018

Pages: 99-107 Published Online: Dec. 20, 2018
DOI:
10.11648/j.sjc.20180606.11
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Pages: 108-114 Published Online: Jan. 2, 2019
DOI:
10.11648/j.sjc.20180606.12
View 897 Downloads 262

Pages: 115-122 Published Online: Jan. 2, 2019
DOI:
10.11648/j.sjc.20180606.13
View 922 Downloads 170