Hu shi suan shu xi cao - Li, Rui 1773-1817 (Zhonghua shu ju, 1999)
In : Zhi bu zu zhai cong shu. - Title from original t.p. - Each page represents 2 leaves of the original. - Originally published in : Zhi bu zu zhai cong shu ; di 21 ji. Bao Tingbo, Qianlong zhi Jiaqing [between 1736 and 1820]