The fundamental operations in bead arithmetic
Subtitle: how to use the  Chinese abacus
By: by C. C. Woo.
Contributors: Woo, C. C.
Publisher: China Lace Co.
Published: 1940
Place of publication: Hong Kong
Language: eng
Number of pages: 52
Subjects: Abacus.
Other titles: Bead arithmetic.
Notes: Originally published in 1922 under the real author's name: Kwa Tak Ming.