TY  - BOOK
AU  - Barde Jean Philippe Ed.
AU  -  Pearce David W. Ed.
TI  - Valuing the environment :  Six case studies   
U1  - X:(G:55), N1 
PY  - 1991///
CY  - London
PB  - Earthscane Publications U. K.       
KW  - Environmental Economics
N1  - Organisation for Economic Cooperation and Development Publication
ER  -