TY  - BOOK
AU  - Handley,Bill
TI  - Speed mathematics: Secret skills for quick calculation 
SN  - 0471467316
AV  - QA111 H36 2003
PY  - 2003///
CY  - New Jersey
PB  - John Wiley & Sons, Inc.
KW  - Lemb
KW  - Matemáticas
KW  - Aritmética mental
ER  -