[comp.lang.prolog] Good Prolog Manual/Book

aniekan@wasat.usc.edu.UUCP (05/29/87)

I need a reference to a User Manual for Prolog that is both
easy-to-read and technically sound.  If you have come across
such a manual/book, I would appreciate you telling me the 
title and author.

thanks,
Aniekan.