search query: @author Sum, Y.L. / total: 1
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| title | year | author | ||
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Marketing and Research Today
1997 : FEB, VOL. 25:1, p. 25-30 |
1997 | Sum, Y.L. |
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| title | year | author | ||
| 1. |
Marketing and Research Today
1997 : FEB, VOL. 25:1, p. 25-30 |
1997 | Sum, Y.L. |