TY  - BOOK
AU  - Benjmin, Arthur
AU  - Shermer, Michael
TI  - Secrets of mental health : the mathemagician's guide to lightning calculation and amazing math tricks
SN  - 978-0-307-33840-2
U1  - C 510 B43s 
CY  - New york 
KW  - Magic tricks in mathematics education
KW  - Mental arithmetic - Study and teaching
KW  - Mental calculator
ER  -