Shelley, John <br/><br/>
Computer studies a first course / 
John Shelley and Roger Hurt 
 - 2nd ed. 
 - London :  Pitman Pub.,  1984 
 - 255 p. :  ill. ;  25 cm. 
<br/><br/> First ed. published 1980 
<br/><br/><label>ISBN: </label>0273020528