Multiple-shift mechanical mining in some bituminous coal mines. Progress report 1

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100 1 ⊔ ‡aToenges, Albert L.
245 1 0 ‡aMultiple-shift mechanical mining in some bituminous coal mines. ‡nProgress report 1 / ‡cby Albert L. Toenges and Robert L. Anderson.
246 1 3 ‡aMechanical mining in some bituminous coal mines
260 ⊔ ⊔ ‡aWashington, D.C. : ‡bU.S. Dept. of the Interior, Bureau of Mines, ‡c1938.
300 ⊔ ⊔ ‡a56 p. : ‡bill. ; ‡c27 cm.
336 ⊔ ⊔ ‡atext ‡btxt ‡2rdacontent
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338 ⊔ ⊔ ‡aonline resource ‡bcr ‡2rdacarrier
490 0 ⊔ ‡aInformation circular / Bureau of Mines ; ‡v7014
500 ⊔ ⊔ ‡a"May 1938" --Cover.
504 ⊔ ⊔ ‡aIncludes bibliographical references.
538 ⊔ ⊔ ‡aMode of access: Internet.
650 ⊔ 0 ‡aCoal-mining machinery. ‡0http://id.loc.gov/authorities/subjects/sh85027388
650 ⊔ 0 ‡aBituminous coal industry ‡zUnited States.
700 1 ⊔ ‡aAnderson, Robert L.
710 1 ⊔ ‡aUnited States. ‡bBureau of Mines. ‡0http://id.loc.gov/authorities/names/n79063444 ‡1http://id.loc.gov/rwo/agents/n79063444
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