Davis Gordon B. <br/><br/>
Study Guide to Accompany Computer Data Processing / 
Davis Gordon B. 
 - 2Ed. 
 - New York :  McGraw-Hill Book Comp.,  1973. 
 - VIII,210s.,/26/k.tabl. ;  30cm. 
<br/><br/><label>Universal Decimal Class. No.: </label>681.3