TY  - BOOK
AU  - Polya,George
TI  - How to solve it: a new aspect of mathematical method 
PY  - 1971///
CY  - Printice Hall
PB  - University Press
KW  - Mathematics
KW  - Study and teaching
KW  - Problems, exercises, etc
N1  - Includes bibliographical references; Open access
ER  -