Investigation of electrical equipment, safety lamps, and gas detectors for safety

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100 1 ‡aIlsley, L. C. ‡q(Lee Clyde), ‡d1880-
245 1 0 ‡aInvestigation of electrical equipment, safety lamps, and gas detectors for safety / ‡cby L. C. Ilsley.
260 ‡aWashington, D.C. : ‡bU.S. Dept. of the Interior, Bureau of Mines, ‡c1939.
300 ‡a13 p. : ‡bill. ; ‡c27 cm.
490 0 ‡aInformation circular / Bureau of Mines ; ‡v7087
538 ‡aMode of access: Internet.
650 0 ‡aSafety lamps.
650 0 ‡aGas detectors.
650 0 ‡aMine lighting ‡xEquipment and supplies.
650 0 ‡aMine safety ‡xEquipment and supplies.
710 1 ‡aUnited States. ‡bBureau of Mines.
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