search query: @author Yu, Houkang / total: 2
references: 1-2 / 2
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1.
Commercial Economy and Management (c)
1998 : 5, p.5-9
1998 Yu, Houkang
2.
Journal of Beijing Institute of Business (c)
1993 : 4, p.1-7
1993 Yu, Houkang
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