Explanation and justification of tentative inspection standards for bituminous-coal mines and lignite mines

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245 0 0 ‡aExplanation and justification of tentative inspection standards for bituminous-coal mines and lignite mines.
260 ‡aWashington, D.C. : ‡bU.S. Govt. Print. Off., ‡c1944.
300 ‡aii, 139 p. : ‡bill. ; ‡c23 cm.
490 0 ‡aMiners' circular ; ‡v45
500 ‡aAt head of title: United States Dept. of the Interior, Harold L. Ickes, secretary. Bureau of Mines, R.R. Sayers, director ...
504 ‡aIncludes bibliography (p. 135-139).
538 ‡aMode of access: Internet.
650 0 ‡aMine inspection ‡vHandbooks, manuals, etc.
650 0 ‡aCoal mines and mining ‡xSafety measures.
650 0 ‡aMining law ‡zUnited States.
710 1 ‡aUnited States. ‡bBureau of Mines.
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