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Primary view of Estimate of Known Recoverable Reserves of Coking Coal in Somerset County, Pennsylvania
Wallace, Joseph J.; Dowd, James J.; Bowsher, John A.; Abernethy, R. F. & Reynolds, D. A.
August 1953
Primary view of Geologic Factors in Predicting Coal Mine Roof-Rock Stability in the Upper Kittanning Coalbed, Somerset County, Pennsylvania
Iannacchione, A. T.; Ulery, J. P.; Hyman, D. M. & Chase, F. E.
1981
Primary view of Analyses of Coals in the United States with Descriptions of Mine and Field Samples Collected between July 1, 1904 and June 30, 1910: Part 1. -- Analyses
Lord, N. W.
1913
Primary view of Analyses of Coals in the United States with Descriptions of Mine and Field Samples Collected between July 1, 1904 and June 30, 1910 Part 2. Descriptions of Samples
Lord, N. W.
1913
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