Duffy Tim <br/><br/>
Four software tools : with wordperfect 5.0/5.1 , Lotus 123 and D base 111 Plus / Tim Duffy 

 - 2nd ed. 
 - WADWORTH 
<br/><br/><label>ISBN: </label>0534984991 
<br/><br/><label>Subjects--Topical Terms: </label><br/>PC DOS (COMPUTER OPERATING SYSTEM)
<br/><br/><label>Dewey Class. No.: </label>005.36 DUF