TY  - BOOK
AU  - Polya,George
TI  - Mathematical discovery: On understanding, learning and teaching problem solving 
CY  - New York
PB  - John Wiley & Sons.
KW  - Mathematics
KW  - Problems, exercises, etc
KW  - Problem solving
N1  - Includes bibliogr. references; Vol. 1(1962; xv, 216 p. : ill. )
ER  -