TY  - BOOK
AU  - Hayes-Roth,Frederick
ED  - Research and Development Corporation, 
TI  - Matching and abstraction in knowledge systems
T2  - The Rand paper series
PY  - 1980///
CY  - Santa Monica, California
PB  - Rand Corporation
KW  - Artificial intelligence.
KW  - Cognition
N1  - Includes bibliographical references (page 37)
ER  -