Er hu yan zou fa
By: Bian Baodi bian zhu
Publisher: Xin cheng shu ju
Published: 1974
Place of publication: Xianggang
Language: chi
Number of pages: 63
Subjects: Methods; Er hu
Work titles: Er hu xue xi shou ce
Notes: Originally published under title: Er hu xue xi shou ce. Hong Kong : Yi yuan shu wu, 1961.

Includes exercises in number notation.