TY  - BOOK
AU  - Conrad,Jon M.
AU  - Clark,Colin W.(Colin Whitcomb)
TI  - Natural resource economics: notes and problems 
SN  - 0521331889 :
U1  - 333.7 
PY  - 1987///
CY  - Cambridge
PB  - The University Press
KW  - Natural resources
KW  - Environmental policy
N1  - Includes bibliographical references and index
ER  -