TY  - BOOK
AU  - Charles
AU  - Lester,Frank
ED  - Dale Seymour Publications
TI  - Teaching problem solving: what why and how 
SN  - 0866510826
U1  - 510.71 23
CY  - Palo Alto: 
PB  - Dale Seymour. , 1982
KW  - Teaching
KW  - Mathematics
KW  - Problem solving
N1  - Includes index
ER  -