Willis, Bill <br/><br/>
Express calc user's guide 
Bill Willis 
 - Washington :  Expressware,  1986. 
 - 185p. :  22cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Business<br/>Computer programs
<br/><br/><label>LC Class. No.: </label>HF5548.2.W54