Kramer, Nic J.T.A. <br/><br/>
System thinking  concepts and notions 
by Nic J.T.A. Kramer, Jacob De Smith 
 - Leiden  Martinus Nijhoff Social Sciences  1977 
 - x, 136p. 
<br/><br/><label>ISBN: </label>90 207 0587 3 
<br/><br/><label>Dewey Class. No.: </label>003  / N773