| Author: | Unger, Richard L. | 
|---|---|
| Additional Authors: | Bobick, T. G. | 
| Year: | 1986 | 
| Document Type: | USBI | 
| Issuing Agency: | U.S. Dept. of the Interior, Bureau of Mines, | 
| SUDOC: | I 28.27:9097 | 
| Series: | Information circular / Bureau of Mines ; | 
| Report Number: | 9097 | 
| Subjects: | Coal mines and mining--Safety measures | 
| Mine haulage--Safety measures | |
| Spine--Wounds and injuries | |
| Coal mine accidents | |
| Mine haulage--Accidents | |
| Link: | https://hdl.handle.net/2027/mdp.39015078464701 |