TY  - BOOK
AU  - Checkland Peter
TI  - Systems Thinking, Systems Practice: : a 30-year retrospective
SN  - 9780471986065
U1  - 003 
PY  - 2007///
CY  - New york
PB  - John wiley & sons ltd.
KW  -  informatyka metodologia
N1  - Bib and Ref
ER  -