TY  - BOOK
AU  - Ernest George W
AU  -  Newell Allen
TI  - GPS :  A case study in generality and problem solvi   
T2  - Association for Computing Machinery, Monograph series
U1  - D6,9(B), K9 
PY  - 1969///
CY  - New York
PB  - Academic press USA       
KW  - Computer Science
ER  -