search query: @author Qian, Shuang / total: 2
references: 1-2 / 2
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1.
Group Economics Research (c)
1994 : 4, p.12-13
1994 Qian, Shuang
2.
Group Economics Research (c)
1994 : 2, p.9-11
1994 Qian, Shuang
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