You are about to access our book library "Xiang jie jiu zhang suan fa : [lei zuan / Yang Hui zhuan. Zha ji / Song Jingchang zhuan.,詳解九章算法 : [類纂 / 楊輝譔. 札記 / 宋景昌譔. Volume v. 1-3 1842 [Leather Bound] full version" .