Ackoff, Russell Lincoln, <br/><br/>
On purposeful systems 
[by] Russell L. Ackoff and Fred E. Emery. 
 - Chicago  Aldine-Atherton  [1972] 
 - xii, 288 p.  illus.  25 cm. 
<br/><br/>Includes bibliographies. 
<br/><br/><label>ISBN: </label>0202370003 
<br/><br/><label>LCCN: </label>78075980 //r88 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social systems<br/>Social sciences--Methodology.
<br/><br/><label>LC Class. No.: </label>H61  / .A38 
<br/><br/><label>Dewey Class. No.: </label>300/.1/82