Burch, John G <br/><br/>
Information systems 
by John g Burch and nathan Hud 
 - London  John Wiley & Sons  1975 
 - 223p. 
<br/><br/><label>ISBN: </label>0471123234 
<br/><br/><label>Dewey Class. No.: </label>001 BUR/INF