TY  - BOOK
AU  - Willis Kenneth G
AU  -  Bateman Ian J Ed
TI  - Valuing environmental preferences:  Theory and prac   
SN  - 0198288530
U1  - X:(G:55), N9 
PY  - 1999///
CY  - Oxford
PB  - University Press         
KW  - Economics irt Environment
ER  -