Checkland, Peter. , <br/><br/>
Soft systems methodology :  a 30-year retrospective / 
Peter Checkland. 
 - 1 volume (various pagings) :  illustrations ;  23 cm. 
<br/><br/><label>ISBN: </label>0471986062 
<br/><br/><label>Subjects--Topical Terms: </label><br/>System theory.
<br/><br/><label>LC Class. No.: </label>Q295   / .C43 2000