search query: @author Du, Yi / total: 2
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| title | year | author | ||
| 2. |
Economics Information (c)
1994 : 7, p.21-24 |
1994 | Du, Yi Zhang, Xingli |
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| title | year | author | ||
| 2. |
Economics Information (c)
1994 : 7, p.21-24 |
1994 | Du, Yi Zhang, Xingli |