search query: @author Sun, Yu / total: 2
references: 1-2 / 2
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title | year | author | ||
1. |
Journal of Tianjin University of Commerce (c)
1999 : 5, p.29-32 |
1999 | Sun, Yu Sun, Yan |
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2. |
International Economics and Trade Research (c)
1992 : 5, p.19-21 |
1992 | Sun, Yu Ning, Zhiping |
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