€¦ · Cook, C. W. , R.M. Hyde, and P. L. Sims, Reveqetation Guidelines for Surface Mined Areas,...
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€¦ · Cook, C. W. , R.M. Hyde, and P. L. Sims, Reveqetation Guidelines for Surface Mined Areas, ... Non—Meta1 Mines, Mining Journal ... Underground Bulkhead For High