Ratzan, Lee. <br/><br/>
Understanding information systems : what they do and why we need them /  
by Lee Ratzan. 
 - /   . 
 - Kolkata :   Indiana Publishing House ,   2009. 
 - 253p. :   tables ;   25cm .  
<br/><br/>Includes index and bibliography 
<br/><br/><label>ISBN: </label>818408238X  RS995.00 
<br/><br/><label>Subjects--Index Terms: </label>LIBRARY OPERATION 
<br/><br/><label>Dewey Class. No.: </label>025  / RAT/U