00563cam a2200169 7i4500 0000037172 20250219090000.0 0471986062 (pbk) 003 CHE 1999 Q295 CHE 1999 CHECKLAND Systems thinking, systems practice : Includes a 30-year retrospective Peter Checkland. Chichester: John Wiley and Sons Ltd., 1999. 1 v. (various pagings): ill.; 23 cm. BIT System theory http://www.wiley.com/WileyCDA/WileyTitle/productCd-0471986062.html