Willam S Davis, Paul Schreiner <br/><br/>
DBASE III plus 

 - 
 -  Addison-Wesley Publishing  1990 
 - 178 
<br/><br/>  
<br/><br/><label>ISBN: </label>0-201-19825-8 
<br/><br/><label>Dewey Class. No.: </label>004.4