TY  - BOOK
AU  - Polya, George
TI  - How to solve it: The classic introduction to mathematical problem -solving -with a foreword by Lan Stewart
SN  - 9780140124996
CY  - London
KW  - Mathematics Study and teaching.; Mathematics Problems, exercises, etc.; Problem solving
N1  - Originally published: 2nd ed. [Princeton, N.J.] : Princeton University Press, 1957. With new foreword by Sam Sloan
ER  -