The Effect of Mining Out Coal No. 6 Before Taking Out the Seams Above it
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Date
1887-08-15
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Description
Item includes a discussion between A. Roy, J. L. Morris, T. Bancroft, A. Howells, E. McMillin and W. Dalrymple of Thomas Middleton's paper
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Citation
Ohio Mining Journal, vol. 5, no. 4 (August 15, 1887), 132-137.