The Trachtenberg speed system of basic mathematics.

Bibliographic Details
Main Author:	Cutler, Ann
Other Authors:	McShane, Rudolph Matas (joint author.)
Format:	Book
Language:	English Undetermined
Published:	Garden City, N.Y. Doubleday [c1960]
Edition:	[1st ed.].
Subjects:	Trachtenberg, Jakow > 1888-. Arithmetic.