Lay, P. M. Q.  1945- <br/><br/>
Die beginsels van handelsdataverwerking / 
P.M.Q. Lay, M.G. Eccles, F.W. Julyan, G. Boot. 
 - Derde uitgawe. 
 - Kaapstad :  Juta,  1989. 
 - viii, 396 pages :  illustrations ;  25 cm 
<br/><br/> English title: The principles of business computing. 
<br/><br/><label>ISBN: </label>0702121916 9780702121913 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Business--Data processing.
<br/><br/><label>Dewey Class. No.: </label>658