Cutler, Ann.
The Trachtenberg speed system of basic mathematics. Translated and adapted by Ann Cutler and Rudolph McShane. - [1st ed.] - Garden City, N.Y., Doubleday, 1960. - 270 p. illus. 22 cm.
60013513
Trachtenberg, Jakow, 1888-1953.
Arithmetic.
QA115 / .C99
510.2 / CUT
The Trachtenberg speed system of basic mathematics. Translated and adapted by Ann Cutler and Rudolph McShane. - [1st ed.] - Garden City, N.Y., Doubleday, 1960. - 270 p. illus. 22 cm.
60013513
Trachtenberg, Jakow, 1888-1953.
Arithmetic.
QA115 / .C99
510.2 / CUT