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Inverted pyramid-shaped plugs for closing abandoned mine shafts : Galena, KS, demonstration project /
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| Main Author: | |
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| Other Authors: | |
| Format: | Government Document Book |
| Language: | English |
| Published: |
Pittsburgh, Pa. :
U.S. Dept. of the Interior, Bureau of Mines,
1985.
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| Series: | Information circular (United States. Bureau of Mines) ;
8998. |
| Subjects: | |
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