TY  - BOOK
AU  - Cutler,Ann
TI  - The Trachtenberg speed system of basic mathematics
AV  - QA115 C99
PY  - 1960///
CY  - Garden City, N. Y.
PB  - Doubleday
KW  - Trachtenberg, Jakow,
KW  - Aritmética
ER  -