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Are you Yih-Long Chang, author of the books below?
Qsom by Yih-Long Chang WinQSB by Yih-Long Chang WinQSB by Yih-Long Chang QSB+ 2.1 by Yih-Long Chang Qsb Plus by Yih-Long Chang Qsb+ by Yih-Long Chang Qs Quant Systems Versio 2.1 by Yih-Long Chang Macoqsb by Yih-Long Chang Qsb + Quantitative Systems for Business Plus Version 3.0 by Yih-Long Chang QSB plus Quantitative Systems For Business Plus by Yih-Long Chang


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