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Download or read book Influence of Subjacent Gob on Longwall Development Mining in the Upper Kittanning Coalbed of South central Pennsylvania written by Eric R. Bauer and published by . This book was released on 1992 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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Download or read book Information Circular written by United States. Bureau of Mines and published by . This book was released on 1993 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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Download or read book Effects of Abandoned Multiple Seam Workings on a Longwall in Virginia written by Gregory J. Chekan and published by . This book was released on 1989 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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Download or read book List of Bureau of Mines Publications and Articles with Subject and Author Index written by United States. Bureau of Mines and published by . This book was released on 1995 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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