TY  - BOOK
AU  - Roberts R.D. Ed.
AU  -  Roberts T.M. Ed.
TI  - Planning and ecology
U1  - X:89K0aG:5, M4 
PY  - 1984///
CY  - London
PB  - Chapman and Hall UK     
KW  -  ECONOMICS
KW  - MANAGEMENT
ER  -