The principles of business computing / 
by P. M. Lay .... [et al]. 
 - Kenwyn :  Juta,  1984. 
 - viii, 370 pages :  illustration. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>070212141X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Business computing.
<br/><br/><label>LC Class. No.: </label>HF5548  / LAY