TY  - BOOK
AU  - Polya,George
TI  - Mathematical discovery: on understanding, learning, and teaching problem solving
SN  - 0471089753
PY  - 1981///
CY  - New York
PB  - John Wiley & Sons
KW  - Mathematics
KW  - Problems, exercises, etc
KW  - Problem solving
N1  - First issued in two volumes; Bibliography: pages 207-209
ER  -