TY  - BOOK
ED  - World Book - Childcraft Int'l Inc
TI  - Childcraft the how and why library: math magic
U1  - R 510 W893c 1981 no.13 
PY  - 1981///
CY  - London
PB  - World Book - Childcraft Int'l Inc.
KW  - Mathematical recreations
ER  -