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ArchiveVolume 8, Issue 2, December 2020
Boubacar Solly, El Hadji Balla Dieye, Oumar Sy
Pages: 35-49     Published Online: Sep. 28, 2020
DOI: 10.11648/j.ajrs.20200802.11        Views 101      Downloads 50
Chunhua Zhao, Simon Blackmore, Sam Wane, Michael Warbrick
Pages: 50-57     Published Online: Nov. 4, 2020
DOI: 10.11648/j.ajrs.20200802.12        Views 38      Downloads 6
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