Checkland, Peter <br/><br/>
Soft system methodology :  a 30 year retrospective, systems thinking, system practice / 
Peter Checkland. 
 - Chichester :  John Wiley,  1999. 
 - xiv, 330 p.:  ill. ;  23 cm. 
<br/><br/><label>ISBN: </label>9780471986065 
<br/><br/><label>Subjects--Topical Terms: </label><br/>System theory
<br/><br/><label>Dewey Class. No.: </label>003 CHE 1999