Ackoff, Russell L. <br/><br/>
On purposeful system 
by Russell L. Ackoff and Fred D. Emery 
 - London  Tavistock  1972 
 - 288p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Psychology<br/>Behaviourism
<br/><br/><label>Dewey Class. No.: </label>K95 Ac57