TY  - BOOK
AU  - Walberg,Franette
AU  - Reisbord,Lynne
TI  - Puzzle thinking: steps to logical thinking and problem solving 
SN  - 0891680276
PY  - 1980///
CY  - Philadelphia, PA
PB  - The Franklin Institute Press
KW  - Cognition in children
KW  - Logic
KW  - Programmed instruction
KW  - Problem solving in children
KW  - Puzzles
KW  - Thought and thinking
ER  -