TY  - BOOK
AU  - Cutler, Ann, Tr.
AU  - Mcshane, Rudolph, Tr.
TI  - Trachtenberg speed system of basic mathematics
SN  - 285629166
CY  - New Delhi
KW  - Mathematics -- Speed Mathematics
KW  - Multiplication -- Speed multiplication
KW  - Speed mathematics
KW  - Squares and Square roots
KW  - Trachtenberg speed system -- Mathematics
ER  -