TY  - BOOK
AU  - Ellerman A Denny and other
TI  - Markets for clean air :  The U S acid rain program   
SN  - 0521660831
U1  - X:(G:55).73.N9, P0 
PY  - 2000///
CY  - Cambridge
PB  - Cambridge University Press        
KW  - Environmental Economics-United States
ER  -