ArchiveVolume 7, Issue 2, April 2019
Hailu Duguma Muleta, Mosisa Chewaka Aga
Pages: 36-42     Published Online: Jun. 10, 2019
DOI: 10.11648/j.jps.20190702.11        Views 211      Downloads 84
Cai Ziyi, Han Mengmeng, Zhang Xingyuan, Gao Xiang, Wang Fang, Pang Meixia, Qi Jinghua
Pages: 43-47     Published Online: Jun. 15, 2019
DOI: 10.11648/j.jps.20190702.12        Views 190      Downloads 28
Jiaying Wang, Wen Li, Jihong Zhang, Ying Xu, Xianfeng Chen
Pages: 48-53     Published Online: Jun. 28, 2019
DOI: 10.11648/j.jps.20190702.13        Views 174      Downloads 26
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