TY  - BOOK
AU  - Conrad,Jon M.
AU  - Clark,Colin W.
TI  - Natural resource economics: Notes and problems 
SN  - 0-521-33188-9
PY  - 1987///
CY  - Cambridge, New York, New Rochelle, Melbourne, Sydney
PB  - Cambridge University Press
KW  - Natural resources
KW  - Environmental policy
ER  -