Hanken, A. F. G. <br/><br/>
Social systems and learning systems   
by A. F. G. Hanken , H. A. Reuver. 
 - Boston  Martinus Nijhoff Publishing  1981 
 - x, 243p. 
 - Frontiers in systems research  V.4 .
<br/><br/><label>ISBN: </label>0898380502 
<br/><br/><label>Dewey Class. No.: </label>300  / N81