TY  - BOOK
AU  - Newell Allen
AU  -  Simon Herbert A
TI  - Human problem solving
SN  - 0134454030
U1  - S:D6,9(B), L2 
PY  - 1972///
CY  - New Jersey 
PB  - Prentice-Hall         
KW  - Psychology
N1  - Bibliography: P 891-901; Appendix at the end of each chapter
ER  -