Harpool Jack D. <br/><br/>
Business data systems :  A practical guide / 
J.D. Harpool. 
 - Dubuque, Iowa :  Wm.C. Brown,  1978. 
 - xv, 448 p. :  ill. ;  26 cm. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>0-697-08126-5 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Business