Tests of strength of roof supports used in anthracite mines of Pennsylvania : report of the United States Bureau of Mines to the Pennsylvania State Anthracite Mine Cave Commission and review of the compressive strength of anthracite, bituminous coals and mine supports

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書誌事項

タイトル
"Tests of strength of roof supports used in anthracite mines of Pennsylvania : report of the United States Bureau of Mines to the Pennsylvania State Anthracite Mine Cave Commission and review of the compressive strength of anthracite, bituminous coals and mine supports"
責任表示
[by George S. Rice]
出版者
  • U.S.G.P.O.
出版年月
  • 1929
書籍サイズ
24 cm

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注記

Statement of responsibility from under caption title

At head of title: Department of Commerce, R.P. Lamont, secretary, Bureau of Mines, Scott Turner, director

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