Available online at www.sciencedirect.com
Procedia Social and Behavioral Sciences 23 (2011) 65–66
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* Corresponding author. E-mail address:
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1877–0428 © 2011 Published by Elsevier Ltd. doi:10.1016/j.sbspro.2011.09.172
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Yi Guo et al. / Procedia Social and Behavioral Sciences 23 (2011) 65–66
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