TY  - BOOK
AU  - Gardner, Martin
TI  - Aha! a two volume collection : aha! gotcha, aha! insight
SN  - 9780883855515
U1  - 793.74 GAR 
PY  - 2006///
CY  - Washington, DC
PB  - Mathematical Association of America
KW  - Mathematical recreations
ER  -