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Inverted pyramid-shaped plugs for closing abandoned mine shafts :Galena, KS, demonstration project
| Author: | Dressel, W. M. |
|---|---|
| Additional Authors: | Volosin, John S. |
| Year: | 1985 |
| Document Type: | USBI |
| Issuing Agency: | U.S. Dept. of the Interior, Bureau of Mines, |
| SUDOC: | I 28.27:8998 |
| Series: | Information circular / Bureau of Mines ; |
| Report Number: | 8998 |
| Subject: | Mine filling |
| Link: | https://hdl.handle.net/2027/mdp.39015078458620 |
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