Improving the human condition  quality and stability in social systems, proceedings /  [Texte imprimé] : 
the Silver anniversary international meeting London August 20-24, 1979 ; ed. by Richard F. Ericson 
 - Washington:  The Society for General Systems Research,  1979 
<br/><br/><label>ISBN: </label>0-387-90442-5 
<br/><br/><label>Dewey Class. No.: </label>301.01