TY  - BOOK
AU  - Eggert Roberick G Ed.
TI  - Mining and the environmjent :  International perspe   
U1  - X9(HZ):(G:55), N4 
PY  - 1994///
CY  - Washington
PB  - Resources for the future. USA      
KW  - Minings
N1  - John M Olin distinguished lectures in mineral economics
ER  -