TY  - BOOK
AU  - Harmelen,Frank Van
AU  - Lifschitz,Vladimir
AU  - Porter,Bruce
TI  - Hand book of knowledge representation
SN  - 9780444522115 :
U1  - 006.3 
PY  - 2008///
CY  - Amsterdam
PB  - Elsevier
KW  - Knowledge
N1  - Includes index
ER  -