Dirickx, Yvo M I. <br/><br/>
Systems analysis by multilevel methods :  with applications to economics and management / 
by Yvo M I Dirickx and L Peter Jennergren. 
 - Chichester :  J Wiley & sons,  1979. 
<br/><br/><label>ISBN: </label>047127626X  
<br/><br/><label>Dewey Class. No.: </label>658.4032  / DIR