Duffy, Tim <br/><br/>
Four software tools  DOS for IBM PC and MS DOS word processing using wordperfect 5.0 and 5.1 spreadsheets using lotus 1-2-3 releases 2.01 and 2.2 database management using dBase 111 plus 
Tim Duffy 
 - 2nd ed. 
 - Belmont, Ca.  Wadsworth Publishing Co.  1991 
 - 1v. (various pagings) : ill. ; 28 cm. 
<br/><br/><label>ISBN: </label>0534149707 
<br/><br/><label>LCCN: </label>90-013114 
<br/><br/><label>Subjects--Topical Terms: </label><br/>PC DOS (Computer operating system)<br/>MS-DOS (Computer operating system)<br/>WordPerfect (Computer program)<br/>Lotus 1-2-3 (Computer program)<br/>dBase III Plus (Computer program)