TY  - BOOK
AU  - "United Nations, Economic Commission for Europe"
ED  - "United Nations, Economic Commission for Europe"
TI  - Policies and systems of environmental impact assessment
T2  - "U. N. Environmental series, 4."
U1  - "X:(G:55), N1/UN" 
PY  - 1991///
CY  - New
PB  - York United Nations USA    
KW  - Environmental Economics
ER  -