TY  - BOOK
AU  - Ball,Johnny
TI  - Why pi?
SN  - 0756651646
U1  - 510 22
PY  - 2009///
CY  - London, New York
PB  - DK
KW  - Mathematics
KW  - sears
KW  - History
N1  - Includes index; Book Links (A.L.A.), June 2010; 6.5; 5-8; Follett Library Resources
N2  - A collection of activities that explore practical math applications from throughout history
ER  -