TY  - BOOK
AU  - Brown,Stephen I
AU  - Walter,Marion I.
TI  - The art of problem posing
SN  - 9780805849769
AV  - QA63 
PY  - 2005///
CY  - Mahwah, New Jersey
PB  - Lawrence Erlbaum
KW  - Problem solving
N1  - Previous edition: 1990; 2; 2
ER  -