Checkland, Peter <br/><br/>
Systems thinking, systems practice / 
 Soft systems methodology :  a 30-year retrospective 
Peter Checkland 
 - Chichester ;  New York :  John Wiley & Sons,  c1999 
 - A66, xiv, 330 p. :  ill. ;  23 cm. 
<br/><br/>Includes bibliographical references and indexes 
<br/><br/><label>ISBN: </label>0471986062 
<br/><br/><label>Subjects--Topical Terms: </label><br/>System theory