TY  - BOOK
AU  - Gardner,Martin
TI  - Mathematical circus
SN  - 9780140134780:
U1  - 793.74 
PY  - 1979///
CY  - New York
PB  - Knopf
KW  - Mathematical recreations
N1  - "Most of this book originally appeared in slightly different form in Scientific American."
ER  -