Zhuang Heng (清) 莊亨 Zhuang shi suan xue 莊氏算學 Zhuang shi suanxue Zhuang Heng (清) 莊亨 [撰] - ju Gu-gong-bo-wu-guan suo cang Wen-yuan-ge ben ying yin 據故宮博物院所藏文淵閣本景印 - 4 ts'e, 8 chüan - 四庫全書珍本 091 . Subjects--Topical Terms: Science -- Mathematics -- Qing