TY  - BOOK
AU  - Trachtenberg, Jakow
AU  - Cutter, Ann (Tr.)
AU  - Meshane, Rudolph (Tr.)
TI  - The Trachtenberg speed system of basic mathematics
U1  - 511 21st
PY  - 1960///
CY  - London
PB  - Souvenir Press
KW  - Arithmetic; Multiplication
ER  -