TY  - BOOK
AU  - CONRAD Jon M
AU  -  CLARK Colin W
TI  - Natural resource economics:  Notes and problems.   
U1  - X:271:(B), M7/TD 
PY  - 1987///
CY  - Cambridge
PB  - Cambrdige University Press        
KW  - Natural Resources Economics
N1  - Bibliography: p.225-28
ER  -