TY  - BOOK
AU  - Covington Michael A
AU  -  Nute Donald
AU  -  Vellino Andre
TI  - Prolog programming in depth
U1  - D65,8(B)92Pr, M8 
PY  - 1988///
CY  - Glenview
PB  - Scott foresman & co.      
KW  -  Prolog
KW  - Computer science
ER  -