TY  - GEN
AU  - Gunatilak ,  Herath. M.
TI  - Environental  valution: theory and applications
SN  - 9559812106
U1  - 333.7 
PY  - 2003///
CY  - Peradeniya
PB  - PGIA
KW  - ENVIRONMENTAL ECONOMIC
KW  - NATURAL RESOURCES
KW  - ENVIRONMENTAL VALUATION
ER  -