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Longwall gob degasification with surface ventilation boreholes above the Lower Kittanning coalbed
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Main Author: | |
---|---|
Corporate Author: | |
Other Authors: | , |
Format: | Book |
Language: | English |
Published: |
Washington :
Bureau of mines,
1976.
|
Series: | Report of investigations (United States. Bureau of Mines) ;
8195. |
Physical Description: |
13 pages : illustrations, diagrams ; 26 cm. |
Subjects: |
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