Erh hu yen tsou fa
By: Pien Pao-ti pien chu.
Publisher: Hsin chʻeng shu chü
Published: 1974
Place of publication: Hsiang-kang
Language: chi
Number of pages: 63
Subjects: Ching hu -- Methods
Work titles: Erh hu hus̈eh hsi shou tsʻe
Notes: Title from caption of table of contents: Erh hu hus̈eh hsi shou tsʻe.

includes exercises in number notation.

Reprint of the 1961 ed. published by I yüan shu wu, Hongkong.