TY  - BOOK
AU  - Beckmann,Petr
ED  - St. Martin's Press
TI  - A history of  π (pi)
U1  - 510.9 23
PY  - 1971///.
CY  - New York: 
PB  - St. Martin's Press, 
KW  - Mathematics
KW  - History
N1  - Includes index
ER  -