Influence Of Subjacent Gob On Longwall Development Mining In The Upper Kittanning Coalbed Of South Central Pennsylvania PDF Download

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Report of Investigations

Report of Investigations
Author:
Publisher:
Total Pages: 414
Release: 1991
Genre: Mineral industries
ISBN:

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New Publications

New Publications
Author: United States. Bureau of Mines
Publisher:
Total Pages: 654
Release: 1987
Genre: Mineral industries
ISBN:

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IMSRP.

IMSRP.
Author:
Publisher:
Total Pages: 492
Release: 1988
Genre: Mine subsidences
ISBN:

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