TY  - GEN
AU  - Gunatilake, Herath M.
TI  - Environmental valuation : theory and applications
SN  - 9559812106
U1  - 333.714 
PY  - 2003///
CY  - Peradeniya
PB  - Postgraduate Institute of Agriculture
KW  - Valuation methods
KW  - Natural resources and eco- systems
KW  - Economic values
ER  -