Bertalantty <br/><br/>
 - Mexico  :  Fondo de Cultura Economica,  ollo 
 - 311 p. 
<br/><br/> Trad. de General System Theory 
<br/><br/><label>ISBN: </label>968-16-0627-2 
<br/><br/><label>LCCN: </label>181734 
<br/><br/><label>Dewey Class. No.: </label>658.4 B47Y