TY  - BOOK
AU  - Checkland, Peter
TI  - Soft Systems Methodology in Action: a 30- year retrospective 
SN  - 9780471986058
AV  - Q295 .C514 1990
PY  - 1990///
CY  - Chichester, New York
PB  - John Wiely
KW  - System Theory
KW  - System Analysis
N1  - 

ER  -