Ratzan, Lee <br/><br/>
Understanding information systems: What they do and why we need them 

 - New Delhi  Indiana Publishing House  2009 
 - xvi, 253p. 
<br/><br/><label>ISBN: </label> RS 995.00 
<br/><br/><label>Source: </label> RS 995.00 
<br/><br/><label>Dewey Class. No.: </label>025.04 RAT