TY  - BOOK
AU  - Emery F E ed
TI  - Systems thinking selected readings edited by F E Emery
T2  - Penguin mdern management reading dited by D S Pugh
U1  - X:89M, L62 (2D) 
PY  - 1976///
CY  - London
PB  - Penguin       
KW  - ECONOMICS
ER  -