TY  - BOOK
AU  - Pólya,George
TI  - Mathematical discovery: On understanding, learning, and teaching problem solving 
SN  - 0471089753
AV  - QA43 P62 1981
PY  - 1981///
CY  - New York
PB  - J. Wiley
KW  - Matemáticas
KW  - Problemas, ejercicios, etc
ER  -