Principles of database and knowledge-base systems; v.1 & 2   
ed. by Jeffrey D. Ullman. 
 - Maryland  Comp. Sci. Press  1988 
 - Principles of computer science series  14 .
<br/><br/><label>ISBN: </label>0716781581 
<br/><br/><label>Dewey Class. No.: </label>005.74  / N88.1,N88.2