search query: @author Li, Qingyun / total: 1
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| title | year | author | ||
| 1. |
Economic Science (c)
1998 : 5, p.5-11 |
1998 | Li, Qingyun |
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| title | year | author | ||
| 1. |
Economic Science (c)
1998 : 5, p.5-11 |
1998 | Li, Qingyun |