TY  - BOOK
AU  - Ringland, G. A., Ed.
AU  - Duce, D. A., Ed.
TI  - Approaches to knowledge representation: an introduction
T2  - Knowledge-based and expert systems series
SN  - 0863800645
U1  - 001.535 
PY  - 1988///
CY  - Letchworth
PB  - Research Studies Press
ER  -