TY  - BOOK
AU  - Perman, Roger
AU  - Ma, Yue
AU  - McGilvray, James
AU  - Common, Michael
TI  - Natural resource and environmental economics/Perman, Roger
SN  - 9780582368767
PY  - 1999///
CY  - Essesx
PB  - Pearson education limites
ER  -