50 元券预售OptimizationTelecenterDetermine¥5380去看看中图数字图书专营店发布了【预售 按需印刷】Location Optimization to Determine Rural Telecenter Network20 元券9783659532184OptimizationTelecenterDetermine¥3950去看看澜瑞图书专营店发布了【4周达】Location Optimization to Determine Rural Telecenter Network [9783659532184]