TY  - BOOK
AU  - Polya,George
TI  - Mathematical discovery: on understanding, learning, and teaching problem solving 
SN  - 4871878317 (v. 1 : pbk.)
PY  - 2009///
CY  - New York
PB  - Ishi Press
KW  - Mathematics
KW  - Problems, exercises, etc
KW  - Problem solving
N1  - Previous published by John Wiley & sons, : New York : Wiley, 1961; Includes bibliographical references and indexes
ER  -