Checkland, Peter. <br/><br/>
Soft systems methodology :  a 30-year retrospective / 
Peter Checkland, Jim Scholes. 
 - [New ed.]. 
 - Chichester, Eng. ;  New York :  Wiley,  1999. 
 - A66, xv, 329 p :  ill. ;  23 cm. 
<br/><br/> "Includes a 30 year retrospective": (p. A1-A66). 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0471986054 (hc. : alk. paper) 
<br/><br/><label>LCCN: </label>99036690  
<br/><br/><label>Subjects--Topical Terms: </label><br/>System theory.<br/>System analysis.
<br/><br/><label>LC Class. No.: </label>Q295  / .C449 1999 
<br/><br/><label>Dewey Class. No.: </label>003  / CHS 1999