78 元券9780817645274ProblemsTrainingNumber￥6990去看看澜瑞图书专营店发布了【3-4周达】104 Number Theory Problems : From the Training of the USA IMO Team [9780817645274]
![【3-4周达】104 Number Theory Problems : From the Training of the USA IMO Team [9780817645274]](https://img.alicdn.com/bao/uploaded/i2/2107887916/O1CN01Bha7Dh28LaNVcLuFy_!!4611686018427384108-0-item_pic.jpg_280x380xz.jpg)
