Grouting horizontal drainage holes in coalbeds / by George N. Aul and Joseph Cervik.
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| Format: | Government Document Book |
| Language: | English |
| Published: |
[Washington] :
Dept. of the Interior, Bureau of Mines,
1979.
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| Series: | Report of investigations (United States. Bureau of Mines) ;
8375. |
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| Physical Description: | 16 pages : illustrations ; 27 cm. |
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| Bibliography: | Bibliography: page 16. |