Abacus arithmetic : how to perform some calculations on the chinese abacus /

Bibliographic Details
Main Author:	Crook, Welton J. (Author, Autor/a)
Format:	Book
Language:	English
Published:	Palo Alto, Calif. : Pacific Books, c1958.
Subjects:	ABACO MATEMATICAS INSTRUMENTOS

Description
Physical Description:	69 páginas : ilustraciones ; 20 cm
ISBN:	0870150782

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