TY  - BOOK
AU  - Polya,George
ED  - C. Wiley & Co.
TI  - Mathematical discovery: on understanding, learning, and teaching problem solving 
SN  - 0471089753
U1  - 510.76 23
PY  - 1981///.
CY  - New York: 
PB  - John Wiley, 
KW  - Mathematics
KW  - Problems, exercises, etc
N1  - Includes bibliographical references and indexes
ER  -