Element of information systems/  : a study text for AAT 
by Leonard Seymour-Smith 
 - London:  Stanley Thrones  1990 
 - vi, 178p.:  ill.,  27 cm. 
<br/><br/> Includes bibliographical reference and index 
<br/><br/><label>ISBN: </label>0748704051 
<br/><br/><label>Dewey Class. No.: </label>657.0285