Schaffer, Clifford A. <br/><br/>
Working with FOCUS  an introduction to Database management 

 - New York  Tab Books  1987 
 - xii,240p.  23 cm.  PB. 
<br/><br/><label>ISBN: </label>083062810X 
<br/><br/><label>Subjects--Uniform Titles: </label><br/>Focus-Computer program language<br/><Computer science>
<br/><br/><label>Dewey Class. No.: </label>005.74  / SCH