| Year: | 1980 | 
|---|---|
| Document Type: | USBI | 
| Issuing Agency: | U.S. Dept. of the Interior, Bureau of Mines, | 
| SUDOC: | I 28.27: | 
| Series: | Information circular - Bureau of Mines ; | 
| Report Number: | 8823 | 
| Subjects: | Abandoned mined lands reclamation--Congresses | 
| Strip mining--Environmental aspects--Congresses | |
| Coal mines and mining--Environmental aspects--Congresses | |
| Link: | https://hdl.handle.net/2027/mdp.39015078462051 |