000 00466 a2200157 4500
020 _a9780307338402
082 _a510
090 _c7090
_d7090
100 _a Benjamin, Arthur
245 _aSecrets of mental math : the mathemagician's guide to lightning calculation and amazing math tricks
_c Arthur Benjamin
260 _aUSA
_bThree Rivers Press
_c2006
300 _a278 p.
650 _aMental calculators
700 _a Arthur Benjamin
942 _cBK
_k510 BEN
999 _c10895
_d10895